为大家精心整理了虚拟语气课件（优秀8篇），希望能够帮助到大家。
虚拟语气课件
Ⅰ用以表示虚拟条件的虚拟语气
1. 用if条件从句表示的虚拟条件，是虚拟条件最普通的方式。
① 虚拟现在时表示与现在事实相反的假设，其if 从句的谓语形式用动词的过去式(be 一般用were)，主句用would/ should/ could/ might +动词原形，例如：If I were in your position I would marry her.
② 虚拟过去时是表示与过去事实相反的假设，if 从句的谓语形式用过去完成时即had＋过去分词，主句用would / should / could / might + have +过去分词，例如：If it had not rained so hard yesterday we could have played tennis.
③ 大多数的虚拟条件句属于上面三种情况的一种，但并不排除存在条件和后果中，一个和现在情况相反，另一个和过去情况相反，例如：If you had followed what the doctor said, you would not have been so painful now.这个句子在高中出现频率颇高。
④ 但是，如果后果用了虚拟语气，而条件却用陈述语气，这种用法是错的。
2. 除了表示虚假条件外，if从句还可以表示对将来的推测，由于是将来还没有发生的，所以谈不上是真实的还是虚假的，只能说这个事情发生的可能性有多大。一般情况下，可以用陈述语气的'if从句来表示对一个未来事实的推测，这个事实是完全可能发生的。If从句的谓语形式用一般过去式或用were to / should +动词原形，主句用would / should /could/ might +动词原形，例如：Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn't be able to see her friends very often.
3. 有时可以把含有助动词、情态动词、be或have的虚拟条件句中的连词if 省去，而将had , should, were 等词提到主语之前，即用倒装结构，这时候，如果出现not等否定词，否定词需放在主语后面。这种结构在口语中很少使用，但频频出现在各类考试中出现，例如：If it had not rained so hard yesterday we could have played tennis.→Had it not rained so hard yesterday, we could have played tennis.
4. 大多数的虚拟条件通过上面所讲的两种方法表达，但在个别句子中也可以通过介词without和介词短语but for表达，副词otherwise等表达出来。例如：We didn't know his telephone number; otherwise we would have telephoned him.值得注意的是，包含but for的句子，谓语动词必定要用虚拟形式，但包含without等短语的句子，谓语动词未必一定要用虚拟语气。
5. 有时虚拟条件不是明确地表达出来，而在蕴含在用but引导的从句里，于是便出现了有谓语动词是虚拟语气的主句加上谓语动词是陈述语气的but从句构成的并列复合句，例如I would have hung you but the telephone was out of order.在这样的句子里，如果主句没有用虚拟语气，或者从句用了虚拟语气，都是错的。
Ⅱ用在宾语从句中的虚拟语气
1. 在表示愿望的动词wish后的宾语从句中，需用虚拟语气。（wish后的that 常省略），根据主句时态，从句谓语时态相应退后一位，例如：How she wished his family could go with him.
2. 在具有愿望、请求、建议、命令等主观意愿的动词(desire, demand, advice, insist, require, suggest, propose, order, recommend, decide …) 后的宾语从句中需用虚拟语气。谓语动词用(should) +动词原形。值得注意的是，如果宾语从句的动词是否定的，否定词not的位置应在动词之前，而不是动词之后。例如：The head nurse insisted that the patient not be move.另外，如suggest表达“暗示”，insist表示“坚持某种说法”时，后面的从句不用虚拟语气，例如：Her pale face suggests that she is ill.或He insisted that he did not kill the boy.
除此之外，上述动词也要求用虚拟式
① 在It is+上述动词的过去分词，其后所跟的主语从句中，如It is suggested that pupils wear school uniforms.
② 在上述动词相应的名词形式作主语+连系动词，其后的表语从句中，例如His suggestion was that classed be re-scheduled.
③ 在对上述动词相应的名词进行解释的同位语从句中，如：The workers raised the demand that their pay be increased to cope with the inflation.
3. would （had）rather , would sooner也用来表达主观愿望，它们之后的宾语从句中需用虚拟语气。谓语动词用过去式表示现在或将来，用过去完成式表示与过去事实相反，例如：I would rather he went right now.
Ⅲ其他形式的虚拟语气
1. it is +necessary等形容词后，that主语从句中虚拟形式使用，这类形容词包括necessary, important, essential, imperative, urgent, preferable, vital, advisable等，例如It is necessary that you listen to the teacher carefully.或者It is essential that you be able to pronounce every single word correctly.
2. 在It's (high/about) time 之后的定语从句中需用虚拟语气。谓语动词用过去式，例如It is high time that you went to school
3. 虚拟语气在as if / as though 引导的方式状语从句中的应用（谓语动词形式与wish后的宾语从句基本相同）表示与现在事实相反或对现在情况有怀疑，谓语动词用过去式。例如：He felt as if he alone were responsible for what had happened. 表示过去想象中的动作或情况，谓语动词用过去完成式。
4. 在lest 引导的状语从句中，谓语动词多用虚拟语气，(should )+ 动词原形。例如： The mad man was put in the soft-padded cell lest he injure himself.
5. 在if only 引起的感叹句中需用虚拟语气。谓语动词用过去式或过去完成式。例如： Look at the terrible situation I am in! if only I had followed your advice.
作者：张金该
本组试题将把你带进一个全新的虚拟世界，让你体验解题的无穷乐趣，在你享受快乐的同时，你的解题能力和技巧也会在不知不觉中提高。
1. I ________ that the old man had lived with his daughter ten years ago， but he is still living alone.
A. think B. was thinking C. had thought D. have thought
2. I ________ to go to your birthday party， but I had to look after my mother in hospital.
A. loved B. have loved C. should love D. should have loved
3. They ________ a lecture at 8：30， but they had to put it off because the speaker didn't arrive on time.
A. were to have held
B. were to hold
C. held
D. had held
4. I would rather not ________ with her about it， but I didn't control my feelings at that time.
A. quarrel B. to quarrel C. have quarreled D. had quarreled
5. - I can't recite the poem.
- Well， you are supposed ________ it many times yesterday evening.
A. to read B. to have read C. reading D. having read
6. If I ________ in health， I ________ swimming in the lake with them yesterday.
A. was； went
B. was； was going
C. were; would go
D. had been； would have gone
7. I went to see my uncle last night. Otherwise， I ________ Mr. Smith at my house.
A. met B. would meet C. had met D. would have met
参考答案与简析：
1. C。一些表心理活动的动词（如think， suppose，guess， hope等）可用“过去完成时或一般过去时后接宾语从句”表示一个“与事实不符的过去的想法、猜想或希望”。
2. D。可用“should / would + have liked / loved + to do sth.”表示“过去本来想要做某事而未曾做到”。
3. A。可用“was / were + to have done sth.”表示“过去本来计划、安排做某事，但并未做到”。
4. C。可用“would rather + have done sth.”表示“主观上本来宁愿做某事，而实际上却没有做”，用否定式则表示“主观上本来宁愿不做某事，而实际上却做了”。
5. B。be supposed有“应该”之意，后面只接不定式，若不定式用完成式，表示“过去本来应该做某事，而实际上没有去做”，用否定式意思相反，此用法也含有批评、责备、抱怨之意。
6. D。当if条件状语从句表示对过去情况的假设时，从句谓语用had done，主句用would have done。
7. D。有时虚拟if条件从句不出现，而是通过某些词语（如otherwise， or， without， but for， but等）暗示虚拟语境，这时句子要用虚拟语气，注意要准确判断时间，决定句子谓语动词形式。此题显然与过去相关。
虚拟语气
1） 概念
虚拟语气用来表示说话人的主观愿望或假想，所说的。是一个条件，不一定是事实，或与事实相反。
2） 在条件句中的应用
条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。
一、语气的种类：英语句子中谓语动词的语气有四种：
1.直陈语气(The Indicative Mood)直陈语气用于直截了当地陈述事实、描述状态：
e.g.He has published quite anumber of essays this year.他今年已发表了好几篇论文。
2.祈使语气(The Imperative Mood)祈使语气用于提出请求、命令、建议或是劝告等：
e.g.Wait outside until you are asked.请在外面等候，请你进再进去。
Let's just take abreak,shall we?我们休息一会儿，好吗？
3.疑问语气(the interrogative mood)：用来提出问题
e.g.Where are from?
4.虚拟语气(The Subjunctive Mood)虚拟语气用于表示主观愿望和假设的虚拟情况。虚拟语气不太顾及事实的存在，它表现出说话人的主观因素比较多。所以说话人所讲的内容往往是与事实相反的；或是其实现的可能性微乎其微，甚至于没有实现的可能性。当然，有时为了使说话的语气客气、缓和、委婉，也使用虚拟语气。
e.g.I wish you were more careful.但愿你更细心一些。
If Ihad more money,I would buy abigger apartment.
我要是有再多一点钱，我就买一套更大一些房子。
Would you mind shutting the door?劳驾您把门关上。
二、虚拟语气的种类：虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。虚拟语气在条件句中应用比较多；条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。
三、真实性条件句
真实条件句用于陈述语气，假设的。情况有可能发生，各种结构如下：
条件从句主句
一般现在时shall/will+动词原形
祈使句情态动词一般现在时
e.g.If he comes,he will bring his violin.如果他来，会带小提琴来的。
典型例题：The volleyball match will be put off if it_.
A.will rain B.rains C.rained D.is rained
答案B。真实条件句主句为将来时，从句用一般现在时。
注意：1.在真实条件句中，主句不能用be going to表示将来，该用shall,will.
(错)If you leave now,you are never going to regret it.
(对)If you leave now,you will never regret it.
2.表示真理时，主句谓语动词不用shall(will)+动词原形，而直接用一般现在时的动词形式
四、非真实条件句
1.虚拟语气可以表示过去，现在和将来的情况，时态的基本特点是时态往后推移
2.
与现在事实相反的假设一般过去时(be用were)Would/should/could/might/ought to+动词原形1.If they werehere,they would help you.
2.if we had enough money,we would buy acomputer.
3.if Iwere you,I wouldn't do it.
4.if it rained tomorrow,we'd stay at home.
5.it would be odd if she were awarded the first prize.
与过去事实相反的假设过去完成时Should/would/could/might+have+过去分词1.If he had come yesterday,I should have told him about it.
2.if Ihad been in her position I'd have quit.
3.if the weather hadn't been so bad,we might have gone out.
4.if he had apologized,you should have done so too.
5.I should never have done it if Ihadn't been so hard up.
与将来不大可能发生的事情的假想一般过去时/should/would
+动词原形Should/would/could/might/ought to+动词原形1.If you suc ceeded,everything would be all right.
2.If they invited me,I would certainly attend it.
3.if he went,would you go too?
与将来事实相反的假设were+不定式Should/would/could/might/ought to+动词原形1.if she were to lose her place they would be ruined.
2.if you were to speak to him,it would carry more weight.
五、混合条件句(也叫：错综时间条件句)
有时，主句与从句的动作发生在不同的时间，主句从句谓语动词的虚拟语气形式因时间不同而不同，这种条件句叫做混合条件句
e.g.
1.If you had asked him yesterday,you would know what to do now.如果你昨天问过他，今天就知道做什么了。(从句与过去事实相反，主句与现在事实相反。)
2.If it had rained last night(过去),it would be very cold today(现在).如果昨晚下过雨，今天就会很冷了。
3.if you'd listened to me,you wouldn't be in such trouble now.如果你听了我的话，你现在也不会这样麻烦了
4.if it hadn't been for her care,I should not be speaking to you now.如果不是她照顾我，我也不会在这里和你讲话
5.If the doctor had come in time,any would still be alive.如果医生及时赶到，AMY现在还活着。
六、含蓄条件句：含蓄条件句是指非真实条件句中的条件从句有时不表出来，只暗含在上下文中。含蓄条件句常见的表达方式有：
1.定语从句和状语从句
e.g.anyone who had married such agirl as she would have been regretful.谁娶了像她这样的姑娘都会后悔的
help was promised where it should become necessary.要是需要的话就答应给予帮助
2.介词及介词短语but that,as though,once,but for,without,with,under,under…condition,supposing,suppose,as if,on condition that,in the past等
e.g.but for his pension,he would starve.要不是有养老金，他都要饿死了
without your help,I couldn't have achieved all this.要不是有你帮助我不会取得这些成就
with his aid,you would succeed.如果有了他的帮助，你就会成功。
plants would die without water on the earth.地球上如果没有水，植物就会死的
but for the fog we would have reached our destination long ago.要是没有雾的话，我们很早就到目的地了
under more favourable conditions we could have finished the task.如果条件对我们更有利，我们就会把工作完成得更好
3.连词otherwise,or,but e.g.he would have given you more help,but he has been so busy.他本来要多给你一些帮助，只是他太忙了
seize the chance,otherwise you would regret it.如果不抓住这个机会，你会后悔的
he felt very tired yesterday,or he would have helped you.他昨天觉得很累，不然会帮你的
4.通过分词短语表示条件
e.g.Given more time,we could have done it better.
Legalizing this drug would have disastrous consequence.使毒品合法化会有灾难性的后果
5.用动词不定式表示条件
e.g.It would be amistake not to help him.
She would have done anyghing to make amends.她会做任何事来弥补
特殊情况：情态动词在日常用语中用得很多，使句子显得比较委婉；这类谓语算不算虚拟语气很难说，但有两点是肯定的：
一是它们不受时态的影响，虽然形式接近过去式，却常指现在的情况，而且和虚拟语气在形式上一致，在不少情况下几乎可以说是一种含蓄的虚拟条件句；
二是它们不表示事实，常带有主观色彩，因而使句子显得很委婉。
e.g.I should think that might be agood solution.
could Itrouble you with aquestion?
could you lend me some money?
would you mind taking part?
would you like some tea?
七、虚拟语气在宾语从句中的运用
1.虚拟语气用在would rather，would(just)as soon，would sooner，would prefer(希望)等后接的宾语从句中。意指某人宁愿让另一个人做某事，其后的宾语从句的谓语动词需用虚拟语气。若表示现在或将来要做某事，从句谓语动词需用一般过去时，表示过去已经做的事，从句谓语动词用过去完成时。
e.g.The manager would rather his daughter did not work in the same office.经理宁愿她女儿不与他在同一间办公室工作。
To be frank，I'd rather you were not involved in the case.坦率地说，我希望你不要卷入这件事。
You don't have to be in such ahurry.I would rather you went on business first.你没有必要这么着急，我宁愿你先去上班。
I'd rather you didn't make any comment on the is[]sue for the time being.我倒希望你暂时先不要就此事发表意见。
Frankly speaking，I'd rather you didn't do anything about it for the time being.坦白地说我宁愿你现在对此事什么也不做。
Wouldn't you rather your child went to bed early?为什么你不愿让你的孩子早点上床呢？
注：①若某人愿自己做某事，would rather后用动词原形e.g.I would rather stay at home today.
②would rather...than...中用动词原形e.g.I would rather stay at home than go out today.
2.在表示命令、建议、要求等一类动词后面的从句中，像order,suggest,propose,require,demand,request,insist,command,
insist+(should)do e.g.I suggest that we(should)hold ameeting next week.我建议下周召开个会议。
He insisted that he(should)be sent there.他要求被派到那儿去。
注意：如suggest,insist不表示“建议”或“坚持要某人做某事时”，即它们用于其本意“暗示、表明”、“坚持认为”时，宾语从句用陈述语气。
判断改错：(错)You pale face suggests that you(should)be ill.
(对)Your pale face suggests that you are ill.
(错)I insisted that you(should)be wrong.
(对)I insisted that you were wrong.
3.wish的用法
1．Were it not for the snowy weather, we __________all right.
A. would be B. would have been C. were D. may be
2. ________more careful, his ship would not have sunk.
A. If the captain were B. Had the captain been
C. Should the captain be D. If the captain would have been
3. If he _________ me tomorrow, I would let him know.
A. should call B. should not have been able
C. were not able D. are not able
4. If you asked your father, you ______________ permission.
A. may get B. might get C. should have called D. maybe get
5. _____________today, he would get there by Friday.
A. Would he leave B. Was he leaving
C. Were he to leave D. If he leaves
6. ______I you, I would go with him to the party.
A. Was B. Had been C. Will be D. Were
7.The millions of calculations involved, had they been done by hand, __________all practical value by the time they were finished.
A. could lose B. would have lost
C. might lose D. ought to have lost
8. Had Paul received six more votes in the last election, he ____________our chairman now.
A. must have been B. would have been C. were D. would be
9. If you ________________Jerry Brown until recently, you’d think the photograph on the right was strange.
A. shouldn’t contact B. didn’t contact
C. weren’t to contact D. hadn’t contacted
10. ____________he English examination I would have gone to the concert last Sunday
A. In spite of B. But for C. Because of D. As for
11. Look at the terrible situation I am in! If only I _____________your advice
A. follow B. would follow C. had followed D. have followed
12. Had Paul received six more votes in the last election, he ____________our chairman now.
A. must have been B. would have been
C. were D. hadn’t contacted
13. If the horse won today, it _____________ thirty races in five years.
A. would have won B. won C. must have won D. did have won
14. There is a real possibility that these animals could be frightened, _______a sudden loud noise.
A. being there B. should there be
C. there was D. there having been
17. I would have gone to visit him in the hospital, had it been at all possible, but I ______ fully occupied the whole of last week.
A. were B. had been C. have been D. was
18. I apologize if I __________ you, but I assure you it was unintentional(无意的)l.
A. offend B. had offended
C. should have offended D. might have offended
19. If you hadn’t taken such a long time to get dressed, we’d______________ there by now.
A. be B. circles C. is circling D. be circling
20. The sun rises in the east and sets in the west, so it seems as if the sun ________round the earth.
A. were circling B. circles C. is circling D. be circling
21. I wish that I _______________ with you last night.
A. went B. have gone C. could go D. could have gone
22. I wish I ___________ with her.
A. would be B. am C. was D. were
23. I wish that I_____________ the concert last night.
A. could B. have attended C. could have attended D. attended
24. The picture exhibition bored me to death. I wish I_______________ to it.
A. had not gone B. have not gone
C. did not go D. can not have gone
25. “I wish you___________ me to put these things away,” he said.
A. will help B. help C. are helping D. would help
26. If the Watergate Incident_____________ Nixon would not have resigned from the presidency.
A. did not occur B. had not occurred C. was not occurring D. be circling
27. I hadn’t expected ________James to apologize but I had hoped .
A. him calling me B. that he would call me
C. him to call me D. that he call me
would certainly have attended the meeting, ____________________ .
A. if he didn’t get a flat tire B. if the flat tire hadn’t happened
C. had he not had a flat tire D. had the tire not flattened itself
29. The teacher suggested that her students _____________ experiences with ESP.
A. write a composition on their B. to write composition about the
C. wrote some compositions of his or her D. had written any compositions for his
30. He speaks Chinese as fluently as if he ______________a Chinese.
A. were B. had been C. is D. has been
31. As usual, he put on a show as though his trip____ a great success.
A. had been B. has been C. were D. was
32. Looking round the town, he felt as though he ______________ away for ages.
A. has been B. was C. is D. had been
33. John is so strongly built that he looks as if he ______as elephant.
A. lifts B. is lifting C. lifted D. could lift
34. He described the town as if he_____________ it himself.
A. had seen B. has seen C. saw D. sees
35. At that thought he shook himself, as though he _____________from an evil dream.
A. woke B. wakes C. would wake D. had woke
36. Most insurance agents would rather you ___________ anything about collecting claims until they investigate the situation.
A. do B. don’t C. didn’t D. didn’t do
37. Although most adopted persons want the right to know who ______________their natural parents are, some who have found them wish that they the experience of meeting.
A. hadn’t B. didn’t have had C. hadn’t had D. hadn’t have
38. It is important that the TOEFL office ________ your registration.
A. will confirm B. confirm C. confirms D. must confirm
39.Without electronic computers, much of today’s ___________advanced technology .
A. will not have been achieved B. have not been achieved
C. would not have been achieved D. had not been achieved
40. He speaks Chinese as fluently as if he ____________a Chinese.
A. were B. had been C. is D. has been 41. It is time that the government ______________measures to protect the rare birds and animals.
A. takes B. took C. has taken D. taking
42. Some people are too particular about school records, insisting that every applicant ___all diplomas from elementary school to university.
A. has B. will have C. should have D. must have
43. He was very busy yesterday, otherwise he _____ to the meeting.
A. would come B. came C. would have come D. had come
44. I must say he reads very well, and I shouldn’t be surprised if he___________ acting for a living one day.
A. had taken up B. takes up C. have taken up D. would have taken up
45. If I had seen the movie, I ______________ you all about it now.
A. would tell B. will tell C. have told D. would have told
46. I hadn’t expected ______Henry to apologize but I had hoped .
A. him to call me up B. him calling me up
C. that he would call me up D. that he will call me
47. I had hoped that John ____________a year in Africa, but he stayed there only for three months.
A. spends B. spent C. would spend D. will spend
48. I had hoped that Jennifer___________ a doctor, but she wasn’t good enough at science.
A. will become B. became C. would become D. becomes
49. I’d rather you ___________ anything about it for the time being.
A. do B. didn’t do C. don’t D. didn’t
50. I’d just as soon_______ rudely to her.
A. that you won’t speak B. you not speaking
C. you not speak D. you didn’t speak
51. It’s high time they____________ this road.
A. mend B. mended C. must have mended D. will mend
52. It’s about time people______ notice of what women did during the war.
A. take B. took C. have taken D. will take
53. Everybody has arrived. It’s time we___________ the class.
A. shall start B. would start C. had started D. start
54. ___________ the English examination I would have gone to the concert last Sunday.
A. In spite of B. But for C. Because of D. As for
55. Mary ___my letter; otherwise she would have replied before now.
A. has received B. ought to have received
C. couldn’t have received D. shouldn’t have received
56. John did not feel well yesterday; otherwise he _______to see his classmates off.
A. came B. would come C. would have come D. should be coming
57. He’s working hard for fear that he_____________ .
A. should fall behind B. fell behind
C. may fall behind D. would fall behind
58. Without the dreams of the youth, this invention might____________ for a century.
A. have been postponed B. has been postponed
C. postpone D. be postponed
59. In the past men generally preferred that their wives_______________ in the home.
A. worked B. would work C. work D. were working
60. For a child to give up his less mature idea for a more mature one, it requires that the child _____psychologically ready for the new idea.
A. is B. were C. be D. would be
61. Tom’s father, as well as his mother,_______________ in New York for a few days more.
A. ask him to stay B. ask he to stay
C. asks he stays D. asks he stay
62. Your advice that_____________ till next week is reasonable.
A. she waits B. she wait C. wait she D. she waited
64. It was essential that we lease before the end of the month.
A. sing B. singed C. had signed D. were signing
65. It is appropriate that some time ______thorough study of the results of the Apollo mission.
A. devotes to B. devoted to C. is devoted to D. be devoted to
答案与详解
1．A．条件句表示与现在事实相反的虚拟。
2．B．条件句表示与过去事实的虚拟。
3．A．条件句表示与未来事实的虚拟。
4．B．条件句表示与未来事实的相反。
5．C．条件句表示与现在事实的虚拟。
6．D．条件句表示与现在事实的虚拟。
7．B．这个句子中含有一个省略if，把助动词提前到主语they之前的虚拟条件句，该条件句表示对过去情况的假设，而主句中by the time they were finished 表明主句也应该是对过去发生的情况的假设，因而应该选（B）would have lost为正确答案。
8．（D）这道题目是一个混合虚拟语气的句子。条件句省略了if，把助词had提前到主语前面，表示对过去情况的假设，而主句中now表明了对现在情况的假设，所以应选would(should, could, might)+动词原形这种表达形式。四个选项中只有（D）是正确表达形式，故为正确答案。
9．（D）until recently，因此（D）是正确答案，而主句是隐含的对现在情况的假设，该句是一个混合虚拟条件句。
10．（B）假设的情况有时不是用一个条件句表示，而是隐含在一个由介词如but for、but that、without, 由连词but、副词otherwise 、比较级、形容词、独立主格等表示的上下文中。本句主句表示对过去情况的假设，但事实上由于英语考试而没有去成，即若不是因为英语考试，我本可以去听音乐会，所以应选But for为正确答案。
11．（C）题目中的第一句话表示的是现在真实的情况，而第二句话中所要表达的是应该做但事实上没有做的事，这种情况导致第一句话中真实情况的发生，故If only条件句假设的是过去一种情况，因此应该用had +过去分词，所以正确答案是（C）。
12．D．注意主句now表示现在的时间状语，所以主句是对现在虚拟，从句是对过去虚拟。
13．A．从句对过去的虚拟。
14．B．从句表示虚拟，而主句是事实。
17．（D）本道题目的前半句话是对过去情况的一种假设，但事实上并没有发生，而事实上没有发生的真实原因是句子的后半部分由but引导的转折句所表述的真实。因而but所引导的句子中应该用表示志过去事实相符合的表陈述的时态，即一般过去时。
18．（B）此题要求在if从句中选择适当的动词形式，以主句中的动词apologize(抱歉)来看，if从句中表达的内容应该是过去做的事，因此可以排除（A），因为（A）是现在时。（C）中should+have+过去分词结构表示本来应该做却没有做的事，在此不合题意。（D）选项中的might+have+过去分词表示对过去发生的事情很不肯定的猜测，它表达的内容还不能成为事实，所以藉此道歉真是不知从何说起，因此此处也不合题意。（B）had offended表示当时已经发生了的动作。这是复杂条件句：apologize 是现在，而条件句是表示对过去假设的条件句。
19．（A）该句也是一个复杂条件句（或称作混合虚拟条件句）。条件句表示对过去情况的假设，而主句表示对现在情况的假设，但事实上却与此相反，所以正确答案应该是（A）。
20．（A）as if引导的从句要求用虚拟语气，表示同时或将来的情况，动词要用过去式（be动词用were）或would(could等)+动词原形，本句话中指的是当时的情况，所以要用过去式，故（A）是正确答案。
21．D． 22．D． 23．C． 24．A． 25．D．
26．（B）had not occurred表示对过去的虚拟，条件句中要用过去完成式，主句中要用should(would, could, might)+动词原形的过去分词。
27．（B）had hoped是常见的要求其后的宾语从句用虚拟语气的句型，虚拟语气would+动词原形。
28．（C）表示对过去情况的假设，主句动词形式为would(should, could, might)+have+过去分词，条件句为过去完成式，if可以省略，但要把had提前主语前面。（B），（D）的表达不符合英语表达习惯，所以（C）是正确答案。
29．（A）suggest后面的从句要用虚拟语气形式，其形式为should（可以省略）+动词原形。
30．A．表示与现在相反的虚拟。
31．A．as though引导的与过去相反的虚拟。
32．D．felt是过去式，所以该句是由as though引导的与过去相反的虚拟。
33．D．as if引导的与现在事实相反的虚拟。
34．A．as if引导的与过去相反的虚拟。
35．C．
36．（D）would rather后接从句要求用虚拟语气，形式为过去式，表示对现在或将来的假设，或为过去完成式表示对过去的情况的假设。
37．（C）who引导的定语从句中的现在完成时表示动作业已发生，所以主句中表示的虚拟是针对已经发生了的行为，所以应该用过去完成式表示对过去的虚拟。
38．（B）
39．（C）这是一人含蓄虚拟条件句，通过介词短语without,表示潜在的一种假设，而主句中的情况也早已经发生，所以是对过去情况的一种假设，因此用would not have been achieved这一形式。
40．（D）连so that引导的从句中要求用虚拟语气，表示一种假设，形式为might+动词原形。
41．（B）It is time that是一种要求从句用虚拟语气的常见句型。虚拟语气形式为动词的过去式。
42．（C）
43．（C）otherwise用来表示一种含蓄的虚拟假设，因为是对过去(yesterday)的情况的假设，所以应该用would have come形式。
44．（B）所给的四个选项中没有一个表示对未来的情况的虚拟的形式should+动词原形，或是were to do，因此可以断定if引导的条件句在这里最真实的条件句，用一般现在时表示一般将来时，故（B）是正确答案。
45．（A）这是一个混合虚拟语气的句子，if条件句表示的是对过去情况的假设，而主句是对现在（now）的情况的假设，故用would tell形式。
46．C． 47．C． 48．C．
49．B．would rather引导的虚拟语气其谓语用过去式。
50．D．would as soon引导的虚拟语气，其谓语动词也用过去式。
51．B． 52．B． 53．B． 54．B．
55．C．注意单词otherwise引导虚拟语气。
56．C．同上。
57．A．注意词组for fear that
58．A．注意without
59．C． 60．C． 61．D． 62．B． 64．A． 65．D．
解读虚拟语气
虚拟语气(Subjunctive Mood)是动词的一种特殊形式，用来表达说话人的愿望、请求、意图、建议、惊奇、设想等。虚拟语气这一语法项目几乎是四、六级必考的内容，也是各类英语考试中心测试的重点之一，考生应该熟练掌握。下面从五个方面介绍虚拟语气的用法。第一部分：语气的定义和种类
第二部分：简单句中的虚拟语气
第三部分：名词性从句中的虚拟语气
第四部分：条件句中的虚拟语气
第五部分：其他几种情况下的虚拟语气
第一部分：语气的定义和种类
1 语气(mood)
语气是动词的一种形式，表示说话人对某一行为或事情的看法和态度。
2 语气的种类
⑴、陈述语气：表示动作或状态是现实的、确定的或符合事实的'，用于陈述句、疑问句和某些感叹句。如：
①There are two sides to every question.每个问题都有两个方面。
②Were you busy all day yesterday? 昨天一整天你都很忙吗？
③How good a teacher she is! 她是多好的一位老师啊！
⑵、祈使语气：表示说话人对对方的请求或命令。如：
①Never be late again!再也不要迟到了。
②Don’t forget to turn off the light.别忘了关灯。
⑶、虚拟语气：表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。如：
①If I were a bird, I could fly in the air.如果我是一只小鸟，我就能在空中飞行。
②I wish I could pass the examination.我希望我能通过考试。
③May you succeed!祝您成功！
虚拟语气在语法里算得上是个难点。让我们就从最简单的开始吧。
第二部分：简单句中的虚拟语气
一、情态动词的过去式用于现在时态时，表示说话人的谦虚、客气、有礼貌、或委婉的语气，常用于日常会话中。如：
⑴.Would you be kind enough to show me the way to the post office?请你告诉我去邮局的路好吗？
⑵.It would be better for you not to stay up too late.你最好别熬夜到很晚。
二、表祝愿。
1、常用“may+动词原形”表示祝愿，但愿，此时may须置于句首（多用于正式文体中）。
⑴、May good luck be yours!祝你好运！
⑵、May you be happy!祝你快乐！
⑶、May you do even better!祝你取得更大成就！
⑷、May you have a good time. 祝愿你玩的痛快。
⑸、May the friendship between us last long. 祝愿我们的友情天长地久。
⑹、May you be happy. (注意那个be ) 祝你幸福。
（7）May the world be filled with love! 让世界充满爱！
2、用动词原形。例如：
(1).Long live the people! 人民万岁！
(2).“God bless you,”said the priest.牧师说：“愿上帝保佑你！”
(3).Have a good journey! 祝愿你旅途愉快！
三、表示强烈愿望。（该类型虚拟语气谓语仅用动词原形，第三人称单数也不加“s”）
(1).God save me．
(2).Heaven help us．
四、表命令
1.命令虚拟语气只能用在第二人称(you)，而且通常省略主语(也就是you)。
2.句子尾通常加上感叹号：！
3.虚拟语气动词用一般现在时态(Simple Present)，如：work, be , go
4.否定形式的命令语气，可用助动词do，加上not。
(1). Work !
(2). Work harder !
(3). Be more alert ! (虚拟语气动词Be)
(4). You go out !
(5). Do not work so hard. (do not 表示否定的虚拟语气)
(6). Don't be afraid. (口语中常用don't 代替do not)
五、在一些习惯表达中。如：
(1).You’d better set off now.你最好现在就出发。
(2).I’d rather not tell you the secret.我情愿不告诉你这个秘密。
第三部分：名词性从句中的虚拟语气
第一节：宾语从句(Subordinate Clasue)中的虚拟语气
一、在动词wish后的宾语从句中的虚拟语气
在动词wish后的宾语从句中的虚拟语气，常省去宾语从句的引导词that。
一）、对现在情况的虚拟（与现在的事实相反）：
从句用过去式或过去进行式(时间上是同时的)。其句子结构为：宾语从句的谓语be和were(was)，实义动词用过去式。例：
1. I wish (that可省略，下同)I knew the answer to the question.(wish, 动词过去式knew)我希望知道这个答案。(事实上是不知道)
2. I wish it were spring in my hometown all the year around.(wish, were)但愿我的家乡四季如春。(事实上不可能)
3. I wish I were a bird.(wish, were)但愿我是只小鸟。(事实上不可能)
4. When she was at the party,she wished she were at home.(wished,过去虚拟动词were)(事实上并不在家)
5. Now that he is in China, he wishes he understood Chinese.(wishes,过去虚拟动词understood)
现在他在中国，他希望能懂得中文。(事实上并不懂)
6. When we begin the trip, they will wish they were with us.(will wish,过去虚拟动词were)(事实上并不和我们在一起)
二）、对过去情况的虚拟（和过去的事实相反）：
用wish表示对过去事情的遗憾。其句子结构为：宾语从句的谓语用过去完成时，或would, could, might+现在完成时。例：
1. I wish (that可省略，下同)I hadn't wasted so much time.
我后悔不该浪费这么多时间。(事实上已浪费了)
2. He wishes he hadn't lost the chance.
他真希望没有失去机会。(其实已失去)
3. We wished he had spoken to us.
(wished，had + spoken)(事实上他并没同我们讲)
4. I wish you had called earlier.
(wish, had + called)(事实上已迟了)
5. They will wish they had listened to us sooner.
(will wish,had + listened)(事实上并不如此)
例题分析：I wish I ______ longer this morning, but I had to get up and come to class.
A. could have slept B. slept C. might have slept D. have slept
动词wish后面接从句，表达不可能实现或与事实相反的情况时，谓语动词要用虚拟语气，即用过去式（表示现在发生的动作）或过去完成式（表示过去发生的动作）。本题后半句谓语动词have用的是过去时had to get up and come, 所以前面要用过去完成时表示过去发生的动作。所以， 选项A)could have slept是答案
三）、对将来情况的虚拟(表示将来的主观愿望)：
从句动词“would/should/could/might + 动词原形”(时间上较后)(请注意：主句和从句的主语不相同)。用wish表示对将来事情的愿望。例：
1. I wish it would stop raining.(虚拟动词would+动词原形stop)
我希望雨能停止。(事实上雨还在下着呢)
2. I wish you would be quiet.(would + be)
我希望你安静一些。(事实上那家伙还在吵着呢)
3. You wished she would arrive the next day.(would + arrive)
你希望她第二天会到。(事实上她还没到)
4. I wish she would change her mind.(would + change)
我希望她会改变主意。(呵呵，女孩子可没那么容易就改变主意喔)
5. He will wish we would join him the following week.(would + join)
(只是希望我们和他在一起，实际上还没在一起)
四）、注意：
1.如果将wish改为过去式wished, 其后that 从句中的动词形式不变。例如：
I wished I hadn't spent so much money. 我要是那时没有花掉那么多钱就好了。
2. 如果that 从句中用would , 一般表示对现状不满或希望未来有所改变或请求
I wish he would answer my letter.
I wish prices would come down.
I wish you would help me.
I wish you would stop asking silly questions.
二、在表示建议、命令、要求、忠告等动词的后面的宾语从句中的虚拟语气
由于这些动词本身隐含说话者的主观意见，认为某事应该或不应该怎样，这些词语后面的“that”从句应用虚拟语气，且均以“should+动词原形”表示这种语气，但事实上“should”常被省略，故此从句中谓语动词用原形，常用的此类动词有：
表示“要求”的：ask, desire, request, demand, require, beg
表示“提议、劝告、建议”的：move, prpose, suggest, recommend, advise, vote
表示“决定、命令”的：decide, order
表示“主张”的：maintain, urge
表示“同意、坚持”的：consent, insist
例如：
1.The doctor suggested that he (should) try to lose his weight.
2.He insisted that we (should ) tell him the news.
3.When I suggested that he try shaving cream, he said, “The razor and water do the job. ”(当我建议他用刮胡膏时，他说“剃刀和水就行了”。)
4.He pursued various theories for several days until I suggested we take the toy apart to see how it did work. (他费了几天功夫寻找理论根据，直到我建议拆开看看它是如何转动
虚拟语气教案设计
第三章 虚拟语气
虚拟语气（the subjunctive mood），又称假设语气，是谓语动词的一种形式，表示说话人叙述的内容与事实相反，在现实中并不存在，或实现的可能性很小。
一、动词的语气
语气用来区别讲话人对某一行为或事情的看法和态度。英语中的语气(mood)有三种，分别是陈述语气、祈使语气和虚拟语气。
1.陈述语气
陈述语气一般用来叙述事实或就事实提出询问，主要用于陈述句、疑问句和某些感叹句。
Where there is a will, there's a way. 有志者事竟成。
Can you help me carry the box upstairs 你能帮我把箱子搬到楼上吗？
How I missed the life in the countryside! 我多么想念乡村的生活啊！
2.祈使语气
祈使语气表示说话人向对方提出请求或下达命令。
Come this way, please! 请这边走。
Don't make any noise, will you 别吵，行吗？
Do be careful when crossing the street. 过马路时一定要小心。
3.虚拟语气
虚拟语气表示动作或状态不是客观存在的事实，而是说话人的主观愿望、假设或推测等。
If I were a bird, I could fly in the air. 如果我是一只小鸟，我就能在空中飞行。
I wish it were spring all the year round. 但愿四季如春。
May good luck be yours! 祝你好运！
二、条件句中的虚拟语气
英语中条件从句有两类，一类是真实条件句，另一类是非真实条件句。如果假设的情况可能发生，是真实条件句；如果假设的情况是不存在的或不大可能发生的，则是虚拟条件句。
A．真实条件句
真实条件句表示的假设是可能发生或实现的，主句和从句的谓语动词都要用陈述语气。
If he doesn't come at 8, we won't wait for him. 如果他八点不来，我们就不等他了。
If a flood happened in the past, there was usually a great loss of life and property. 过去发生洪水的话，常有很大的生命和财产损失。
We shall go there unless it rains tomorrow. 如果明天不下雨，我们将去那里。
I'll let you use my bike on condition that you keep it clean. 如果你能保持车子干净，我就让你用我的自行车。
B．非真实条件句
在含有非真实条件句的复合句中，主句和从句的谓语动词都要用虚拟语气，其构成有三种形式：
与现在事实相反 if条件句的谓语：were did
主句的谓：would (couldshouldmight) + do
与过去事实相反 if条件句的谓语：had done
主句的谓：would(couldshouldmight) + have done
与将来事实相反 if条件句的谓语：didwere
主句的谓：should do would (couldshouldmight) + do were to do
1． 表示与现在事实相反的条件
条件从句用动词的过去式（be动词用were），主句用should（第一人称）或would（全部人称）+动词原形。可用情态动词could, might代替should, would表示情态。
If it were Sunday tomorrow, I would go and see my friends. 明天要是星期天的话，我就去看望我的朋友。
If I were you, I should go and try. 我要是你，我就去试试。
If wishes were horses, beggars might ride.
如果幻想能成为马匹，叫花子都有了坐骑
? would go if they treated me like a slave. 要是他们把我当奴隶对待，我就走。
2．表示与过去事实相反的条件
条件从句用动词的过去完成时，主句用should（第一人称）或would（全部人称）+have done，也可用could, might代替should, would。
If I had known your telephone number yesterday, I would have telephoned you. 如果昨天我知道你的电话号码，我就给你打电话了。
If it had not rained this morning, I should have gone shopping. 今天早上要是没下雨，我就去买东西了。
The flood might have caused great damages to the people if we had not built so many reservoirs. 倘若我们没有修建这么多的水库，洪水就会使人民遭受巨大的损失。
3． 表示在将来不太可能实现的条件
表示在将来不太可能实现的条件从句有三种形式：
① weredid
条件从句用动词的过去式（be动词用were），主句用should（第一人称）或would（全部人称）+动词原形。也可用could, might代替should, would。
If he were here tomorrow, I would speak to him. 明天如果他在这里的话，我就和他谈谈。
If you dropped the glass, it would break. 你要是把杯子掉下来，会打碎的。
If she had time, she could help me. 她要是有时间，就会帮我了。
② should do
条件从句中不管什么人称都用should do，可表示有偶然实现的可能性。
If it should rain, the crops could be saved. 假如下雨，庄稼可能就有救了。
We would trust him if he should be honest. 如果他真是诚实的，那我们就相信他。
③ were to do
条件从句用were + to do。这种形式比较正式，常出现在书面语中，其假设成份很大，实现的可能性很小。
If I were to do the work, I should do it in a different way. 要是我做这项工作，我就会以不同的方式去做。
If the headmaster were to come, what would we say to him 假如校长来了，我们对他说什么呢？
对比：
将来不太可能实现的三种非真实条件句中的。虚拟语气对比
If it snowed tomorrow, I would stay at home. 如果明天下雪的话，我就留在家里。
（常用形式）
If it should snow tomorrow, I would stay at home. 如果明天下雪的话，我就留在家里。
（可能性较小）
If it were to snow tomorrow, I would stay at home. 如果明天要下雪的话，我就留在家里。（可能性最小）
C．省略if的条件句
在书面语中，非真实条件句中有were, had, should时，可以省略if，而把were, had, should放在主语前，用倒装结构。
Were it necessary, I might go without delay. 如果需要的话，我可以立即去。（= If it were necessary......）
Had you taken my advice, you wouldn't have failed in the exam. 你要是听了我的建议，就不会考试不及格了。（= If you had taken my advice......）
Should I have time, I would call on her. 要是有时间，我就去看她。（= If I should have time......）
D．错综条件句
虚拟条件句中的主句和从句涉及的动作发生的时间不一致，这时主句和从句的谓语形式应按照各自动作发生的实际时间来表达。
If you hadn't watched TV yesterday, you wouldn't be so sleepy now. 如果你昨天不看电视，你现在也就不会这么困了。（从句yesterday说明过去，主句now说明现在）
If they had left home early this morning, they would arrive in half an hour. 如果他们今天一早就离开家的话，再过半小时他们就该到了。（从句说明过去，主句说明将来。）
If you hesitated this moment, you might suffer in the future. 如果你此刻犹豫不决，你将来会吃苦头的。（从句说明现在，主句说明将来）
注意：
在很多情况下，我们也可以用was来代替当主语是第一人称或第三人称单数时的were。
If were here tomorrow...
也可以说成：If he was here tomorrow...
I wish I were a bird.
也可以说成：I sish I was a bird.
但倒装句型中的were不可被was来替换。
Were I in your position,I would not do it.如果我处在你的位置，我是不会干这件事的。
E．含蓄条件句
非真实条件句中的条件从句有时不表达出来，只暗含在上下文中，这种句子叫做含蓄条件句。含蓄条件句大体有三种情况：
1．条件暗含在短语中
He would not get such a result without your help. 没有你的帮助，他就不会有今天的成果。(条件暗含在介词短语without your help中)
But for you, I could not be recovered so soon. 要不是有你，我就不会恢复得这么快。(条件暗含在But for you中)
This same thing, happening in the past, would lead to a disaster. 同样的事，如发生在过去，就会酿成大祸。(条件暗含在分词短语happening in the past中)
He must have been there, or he never could know the place so well. 他一定是去过那儿，否则他绝不会对那个地方如此熟悉。(暗含条件是连词or)
2．条件可根据上下文推理出
It would do you no good. 这可能会对你没好处。(条件可能是if you should give up the job 如果你放弃这项工作的话)
They could have won. 他们本来是会赢的。(条件可能是if they had been patient 如果他们有耐心的话)
Such mistakes could have been avoided. 这种错误完全能避免。（条件可能是if you had been more careful 如果你更加小心一点的话）
Why didn't you tell me about it I should have helped you. 为什么你不告诉我？我会帮助你的。（条件可能是if you had told me about it
1） 概念
虚拟语气用来表示说话人的主观愿望或假想，所说的是一个条件，不一定是事实，或与事实相反。
2） 在条件句中的应用
条件句可分为两类，一类为真实条件句，一类为非真实条件句。非真实条件句表示的是假设的或实际可能性不大的情况，故采用虚拟语气。