英语语法 虚拟语气(练习)
虚拟语气练习题专升本
虚拟语气练习题专升本虚拟语气是英语中一种表示非现实情况的语法结构，它通常用于表达假设、愿望、建议或条件。
以下是一些虚拟语气的练习题，适合专升本水平的学生进行练习。
1. 假设条件句If I were you, I _______ (会) study harder to pass the exam. If it rained tomorrow, we _______ (将不会) go on a picnic.2. 愿望句I wish I _______ (能) speak English fluently.He wishes he _______ (能) have more time to read books.3. 建议句It is suggested that he _______ (应该) take a break after working for hours.We suggest that she _______ (应该) join the club to improve her skills.4. 让步状语从句Even if he studies hard, he _______ (可能) not pass the exam. No matter how much she tries, she _______ (仍然) can't seem to get it right.5. 虚拟语气在名词性从句中的使用It's important that he _______ (必须) finish the project on time.I'm surprised that she _______ (竟然) hasn't finished herhomework yet.6. 虚拟语气在定语从句中的使用The book that I _______ (希望) to read is on the top shelf. The man who _______ (应该) have helped us is not here.7. 虚拟语气在时间状语从句中的使用She would have called you if she _______ (有) your number.I would have gone with you if I _______ (有时间) last weekend.8. 虚拟语气在目的状语从句中的使用He got up early in order that he _______ (能) catch the first bus.She worked hard so that she _______ (可以) afford her education.9. 虚拟语气在结果状语从句中的使用He was so careless that he _______ (竟然) lost his wallet.She studied so hard that she _______ (竟然) passed the exam with flying colors.10. 虚拟语气在省略if的倒装句中的使用Had I known the truth, I _______ (会) have told you.Should you need any help, don't hesitate to ask.通过这些练习题，学生可以更好地理解和掌握虚拟语气的用法，提高他们在英语考试中的表现。
高中英语语法--虚拟语气练习题（含答案和解释）
高中英语语法--虚拟语气练习题（含答案和解释）虚拟语气练习题1.I enjoyed the movie very much. I wish I _____ the book from which it was made.A. have readB. had readC. should have readD. are reading2.You are late. If you _____ a few minutes earlier, you _____ him.A. come; would meetB. had come; would have metC. come; will meetD. had come; would meet3.The two students talked as if they _____ friends for years.A. should beB. would beC. have beenD. had been4.It is important that I _____ with Mr. Williams immediately.A. speakB. spokeC. will speakD. to speak5.He looked as if he _____ ill for a long time.A. wasB. wereC. has beenD. had been6.If the doctor had come earlier, the poor child would not_____.A. have laid there for two hoursB. have been lied there for two hoursC. have lied there for two hoursD. have lain there for two hours7.I wish that I _____ with you last night.A. wentB. could goC. have goneD. could have gone8.Let’s say you c ould go there again, how _____ feel?A. will youB. should youC. would youD. do you9.I can’t stand him. He always talks as though he _____ everything.A. knewB. knowsC. has knownD. had known10._____ the fog, we should have reached our school.A. Because ofB. In spite ofC. In case ofD. But for11.If you had told me in advance, I _____ him at the airport.A. would meetB. would had metC. would have metD. would have meet12.Mike can take his car apart and put it back together again.I certainly wish he_____ me how.A. teachesB. will teachC. has taughtD. would teach13.I would have told him the answer had it been possible, but I _____ so busy then.A. had beenB. wereC. wasD. would be14.He’s working hard for fear that he _____.A. should fall behindB. fell behindC. may fall behindD. would fallen behind15.If it _____ another ten minutes, the game would have been called off.A. had rainedB. would have rainedC. have seenD. rained16.He suggested that they _____ use a trick instead of fighting.A. shouldB. wouldC. doD. had17.My father did not go to New York; the doctor suggestedthat he _____ there.A. not wentB. won’t goC. not goD. not to go18.I would have gone to the meeting if I _____ time.A. had hadB. have hadC. hadD. would have had19.Would you rather I _____ buying a new bike?A. decided againstB. will decide againstC. have decidedD. shall decide against20.You look so tired tonight. It is time you _____.A. go to sleepB. went to sleepC. go to bedD. went to bed21.—W hy didn’t you buy a new car?—I would have bought one if I _____ enough money.A. hadB. have hadC. would haveD. had had22.If she could sew, _____.A. she make a dressB. she would have made a shirtC. she will make a shirtD. she would had made a coat23._____ today, he would get there by Friday.A. Would he leaveB. Was he leavingC. Were he to leaveD. If he leaves24.His doctor suggested that he _____ a short trip abroad.A. will takeB. would takeC. takeD. took25.The Bakers arrived last nig ht. If they’d only let us know earlier,_____ at the station.A. we’d meet themB. we’ll meet themC. we’d have met themD. we’ve met them26.If I _____ you, I _____ more attention to English idioms and phrases.A. was; shall payB. am; will payC. would be; would payD. were; would pay27.We might have failed if you _____ us a helping hand.A. have not givenB. would not giveC. had not givenD. did not give28.The law requires that everyone _____ his car checked at least once a year.A. hasB. hadC. haveD. will have29.It is strange that he _____ so.A. would sayB. would speakC. should sayD. will speak30.Had I known her name, _____A. or does she know mine?B. and where does she live?C. she would be beautiful.D. I would have invited her to lunch.31.He has just arrived, but he talks as if he _____ all about that.A. knowB. knowsC. knownD. knew32.If I _____ the money, I would have bought a much bigger car.A. possessedB. ownedC. hadD. had had33.He was very busy yesterday; otherwise, he _____ to the meeting.A. would comeB. cameC. would have comeD. will come34.The librarian insists that John _____ no more books from the library before he returns all the books he has borrowed.A. will takeB. tookC. takeD. takes35.I left very early last night, but I wish I _____ so early.A. didn’t leaveB. hadn’t leftC. haven’t leftD. couldn’t leave36.I do not have a job. I would find one but I _____ no time.A. hadB. didn’t haveC. had hadD. have37.I wish that you _____ such a bad headache because I’m sure that you would have enjoyed the concert.A. hadn’tB. didn’t have hadC. hadn’t hadD. hadn’t have38.He insisted that we all _____ in his office at one o’clock.A. beB. to beC. would beD. shall be39.Helen couldn’t go to France after all. That’s too bad. I’m sure she would have enjoyed it if _____.A. she’s goneB. she’ll goC. she’d goneD. she’d go40.I must go there earlier. John has suggested that I _____ an hour before the discussion begins.A. goB. shall goC. will goD. would go1—5 BBDAD 6—10 DDCAD11—15 CDCAA16—20 ACAAD21—25 DBCCC 26—30 DCCCD31—35 DDCCB 36—40 DCACA解析：1.wish后面用虚拟语气，表示与过去事实相反用过去完成时。
自考英语20190122 语法 虚拟语气 练习
20190122 语法虚拟语气一篇一篇文章理解，一句一句看懂，一个一个短语积累，一道一道题提高。
利用好配套Excel文档选自广东卷、全国卷、湖北卷、北京卷•不懂的题，多把句子读几遍，背诵。
语言无非是熟能生巧的过程。
•专注于具体的题。
勿迷失在语法概念上。
与考试不相关的语法概念不必细究。
•语法要重视知识点的积累，多在习题中体会。
虚拟语气虚拟语气表示动作或状态不是客观存在的事实，即与事实相反或难以实现的情况，或者是说话人的主观愿望、假想或推测等。
议。
If he were here, he would help you. 如果他在这里，他会帮助你的。
If he had taken my advice, he would have succeeded in the competition. 如果他采纳了我的建议，在竞赛中他早就成功了。
考试要点1. 对现在的虚拟，用过去时。
If+过去式，主语would/should/could do- If the earth had no gravity, the moon would fly to the sun. 如果地球没有引力，月球就会飞向太阳。
- If I were you, I would consider their proposal. 如果我是你，我会考虑他们的建议。
（虚拟语气be动词用were）2. 对过去的虚拟，用过去完成时。
If+过去完成时had done, 主语would/should/could have done.- If I had left a littler earlier, I would have caught the train. 如果我早点出发，我就能赶上火车了。
3. 对将来的虚拟，用should do或were to do. If… should do (或were to do), 主语would/should/could do. “万一、居然、竟然”- If he should fail, we would encourage him to try again. 万一他失败，我们就鼓励他再试试。
高三英语语法专项练习虚拟语气Word版
虚拟语气专项训练1.You didn’t let me drive. If we _____in turn, you ____so tired.A.drove; didn’t gotB.had driven ; wouldn’t have gotC.drove; wouldn’t getD.were driving; wouldn’t get2.If you ____him yesterday, you ___what to do now.A.asked; would knowB. had asked; would have knownC.asked; knowD.had asked; would know3.The teacher demanded that the work _____before 4 o’clock.A.finishedB.be finishedC.should finishD.finish4.His suggestion that you _____once more sounds reasonable.A.tryB.triesC.must tryD.can try5.How I wish every family ____a large house with a nice garden.A.hasB.hadC.will haveD.had had6.---Do you mind if I leave the window open?---Well, I’d rather you _____A.don’tB.didn’tC.won’tD.mustn’t7.Without electricity, human life ____quite different today.A.isB.will beC.would have beenD.would be8.But for air and water, nothing ___.A.could liveB.can liveC.couldn’t liveD.will be able to live9. It is strange that he _____such a mistake again.A.makesB.madeC.has madeD.should have made10.It is important that we_____wild animals.A.will protectB.should protectC.must protectD.are protect11.(1)I wish she _____there with us now.(2)I wish she _____there with us tomorrow.(3)I wish she ____there with us yesterday.A.goesB.wentC.had goneD.would go12.Her pale face suggested that she _____ill, and her parents guggested she _______ a medical examination.A.be; should haveB.was; haveC.should be; hadD.were;was13.If we ____the other road, we might have arrived here in time for the meeting.(2010,陕西)A.takeB.had takenC.tookD.have taken14.Teachers recommend parents _____their children under 12 to ride bicycles to school for safety.(2010,福建)A.not allowB.do not allowC.mustn’t allowD.couldn’t allow15.They ____two free tickets to Canada, otherwise they’never have been able to afford to go.(07,山东)A.had gotB.gotC.have gotD.getA.should tellB.tellsC.toldD.had told17.This printer is of good quality. If it _____break down within the first year, we would repair it at our expenses.(09,天津)A．would B.should C.could D.might18.Jack is a great talker. It’s high time that he ____something instead of just talking.（2012，辽宁）A.will doB.has doneC.doD.did19.We lost our way in that samll village, otherwise we ____more places of interest yesterday.(2012,福建)A.visitedB.had visitedC.would visitedD.would have visited20.We _______the difficulty together, but why didn’t you tell me?(2012,北京)A.should faceB.might faceC.could have facedD.must have faced21.Had they known what was coming next, they _____second thoughts.(2012,浙江)A.may haveB.could haveC.must have hadD.might have had22.Sorry, I am too busy now. If I _____time, I would certainly go for an outing with you.(2012,湖南)A.have hadB.had hadC.haveD.had二．虚拟语气对比训练1.I don’t know the answer to the question.I wish I ______the answer to the question.2.I didn’t see the film last night.I wish I __________the film last night.3.The boss ordered them to take part in the work.The boss ordered that ____________ part in the work.4.It’s high time for us to go to school.It’s high time that ___________ to school.5.I got up late, so I missed the bus.If I ____________got up late, I ________________the train.。
高中英语虚拟语气练习题(附答案)
高中英语虚拟语气练习题二．选择题C1. , .A. B. C. D.b2. I a .A. B. C. D.d3. . ,A. ; ’tB. ; ’tC. ; ’tD. ; ’t b4. ,A. B. C. D.c5. IA. B. C. D.6. a a ,A. B. C. D.7. I a ,A. ;B. ;C. ;D. ;8.A. B. C. D.9., IA. B. C. D.10. I , IA. B. C. D.11. ,A. B. C. D.12. ,A. ,B. ,C. ,D. ,13. ,A. B. C. D.14. ,A. . C. D.15. ,A. B. C. D.16. I . ,A. B. C. D.17. , .A. ,B. ,C. ,D. ,18. ,A. ,B. ,C. ,D. ’t ,19. ,A. B. C. D.20.A. ’tB. ’tC. ’tD. ’t21. ’s , ,A. B. C. D.22.A. B. C. D.23. aA. B. C. D.24.,A. I’dB. I’dC. I ’ tD. I’d25. IA. ’tB. ’tC. ’tD. ’t26. ,A. B. C. D. ’t27. IA. B. ’t C. ’t D. ’t28.A. B. C. D.29.A. B. C. D.30. aA. B. C. D.31.A. ,B. ,C. ,D. ,32. I a IA. B. C. ’t D. ’t33.A. B. C. D.34.A. B. C. D.35.A. B. C. D.36. I IA. B. C. D.37.A. B. C. D.38. IA. B. C. D.39.A. B. C. D.40.A. B. C. D.41.A. B. C. D.42. , . I ……’t “”, I . , !A. B. ’t C. D. ’t43. I . . I IA. ,B. ,C. ,D. ,44. I I ! IA. B. ’t C. D. ’t45. I’t .A. B. C. D.46. ’sA. ,B. ,C. ,D. ,47. ,A. B. C. D.48. .A. ,B. ,C. ,D. ,49.A. B. C. D.50. a .A. B. C. D.51. ,A. B. C. D.52. aA. B. C. D.53. IA. B. C. D.54. , I a , I IA. B. C. D.55.A. B. C. D.56. I . ,A. B. C. D.57. ,A. B. C. D.58. ,A. ,B. ,C. ,D. ,答案C BD B C C C B A A D A B A C D B C D AD C C B A C B B A B D C C A B B D B A AC D C B C D D B C D B B A A A C D C虚拟语气在条件状语从句中的应用【经典例题】1. , .A. ;B. ;C. ;D. ;2. I , I .A. ’t B ’tC. ’tD. ’t3.— , .A. ;B. ;C. ;D. ;4. I ’t . , .A. B. C. D.【答案与解析】1．A．本题考查虚拟语气。
高中英语语法：虚拟语气专项练习题精选50题 (有答案)
高中英语语法：虚拟语气专项练习50题1．--- I’m sorry. I _______ at you the other day.--- Forget it. I was a bit out of control myself.A. shouldn’t shoutB. shouldn’t have shoutedC. mustn’t shoutD. mustn’t have shouted2 Thank you for all y our hard work last week. I don’t think we ____ it without you.A. can manageB. could have managedC. could manageD. can have managed3. ____ he had not hurt his leg, John would have won the race.A. IfB. SinceC. ThoughD. When4 --- If the traffic hadn’t been so heavy, I could have been back by 6 o’clock.--- What a pity! Tina ____here to see you.A. isB. wasC. would beD. has been5 I was really anxious about you. You ____home without a word.A. mustn’t leaveB. shouldn’t have leftC. couldn’t have leftD. needn’t leave6 He suggested that the person ____to be punished.A. refersB. referC. should referD. referred7 --- Do you think the thief entered the room through the back door?--- No, if he had, I don’t believe he ____the living-room window.A. would breakB. brokeC. would have brokenD. breaks8 Without electricity, human life ____quite different today.A. isB. will beC. would have beenD. would be9 --- ____he come to see you as he promised?--- Of course, please, and I’d rather he ____ me the truth.A. Will; informedB. Shall; toldC. Should; will tellD. Can; tell10 --- He looks very hot and dry.--- So ____ if you had a temperature of 39.A. would youB. will youC. would you have beenD. do you11 I forget where I read the article, or I ________ it to you now.A. will showB. would showC. am going to showD. am showing12. “It looks as if he were drunk.” “So it does. _________.”A. He’d better give up drinkingB. He shouldn’t have drunk so muchC. Health is more important than drinkD. I wonder why he is always doing so13. “Mary looks hot and dry” “So _________ you if you had so high a fever.”A. doB. areC. willD. would14. “He will come tomorrow.” “But I’d rather he _________ the day after tomorrow.”A. will comeB. is comingC. cameD. had come15. All the doctors in the hospital insisted that he ________ badly wounded and that he ________ at once.A. should be; be operated onB. were; must be operated onC. was; should be operatedD. was; be operated on16. _________ smoking, he would not have got cancer in the lung.A. Was he given upB. Had he given upC. Did he giveD. If he gave up17. What a pity! Considering his ability and experience, he ____ better。
七年级下英语常用语法知识——虚拟语气经典练习卷
一、选择题1．I don’t know when he______ tomorrow .When he_____ , I’ll let you know.A．comes ;comes B．will come ; comesC．comes ; will come D．came; will come B解析：B【解析】试题分析：句意：我不知道他明天什么时候来。
当他来的时候，我会让你知道。
When引导的宾语从句，主现从任意，从句根据实际情况而定。
第一个句子从句时间状语是tomorrow，因此用将来时。
When引导的时间状语从句，主将从现。
故选B。
考点：考查宾语从句和时间状语从句的用法。
2．—Did Tina tell you __________ to get to Hefeinan Railway Station?—Yes, she said we would meet there at 3 pm.A．how B．what C．when D．where C解析：C【解析】【详解】句意：——蒂娜告诉你什么时候到合肥南火车站了吗？——是的，她说我们会在3点见面。
考查宾语从句。
本句中使用疑问词+动词不定式的结构，作tell动词的宾语。
how连接副词，如何，在从句中作状语；what连接代词，什么，在从句中作主宾表定；when连接副词，什么时候，在从句中作状语，表时间；where连接副词，哪里，在从句中作状语，表地点。
根据后一句“she said we would meet there at 3 pm.”可知上一句是在问到达地点的时间。
故选C。
3．He wondered ___________.A．that I would leave the next day B．when I would arrive at the airportC．if I have bought a car yesterday D．how could I solve the problem B解析：B【解析】【详解】句意：他想知道我什么时候到达机场。
高中英语语法虚拟语气【65题】（2）
高中英语语法虚拟语气【65题】（2）虚拟语气1. The boy acted ____ he had never lived in Canada before.A. as thoughB. even ifC. asD. since2. ____ to the doctor right away, he might have been alive.A. If he wentB. Were he goneC. Should he have goneD. Had he gone3. If you were older, I ____ you to go there yesterday.A. will allowB. should allowC. would have allowedD. had allowed4. The secretary suggested that they ____ the men in at once.A. had broughtB. should have broughtC. broughtD. bring5. I wish I ____ able to tell him all about it last night.A. wasB. wereC. had beenD. should be6. If we ____ here ten minutes earlier, we ___ the bus.A. arrived/would catchB. arrived/would have caughtC. had arrived/had caughtD. had arrived/would have caught7. If I ____ more time, I would have gone with him.A. hadB. had hadC. have hadD. would have8. He was very busy yesterday, otherwise he ____ to the meeting.A. would comeB. cameC. would have comeD. had come9. The Jade Emperor ordered that the Monkey King _____ right away.A. would be arrestedB. must be arrestedC. be arrestedD. had to be arrested10. Jane's uncle insisted ____ in this hotel any longer.A. not stayingB. not to stayC. that he not stayD. staying not11. Don't touch the sleeping tiger. If he woke up, he _____ you.A. would come toB. would come atC. would have come towardD. will come to12. Without electricity human life _____ quite different today.A. isB. will beC. would have beenD. would be13. How I wish I ____ to reapair the watch! I only made it worse.A. had triedB. hadn't triedC. have triedD. didn't try14. He demanded that the laboratory report ___ immediately after the experiment was done.A. was writtenB. be writtenC. must be writtenD. would be written15. The man insisted that he _____ there.A. should sendB. would be sentC. sentD. be sent16. If he had not gone out in the storm _____.A.he will be alive nowB. he would be alive nowC. he would have been alive now17. If it ___ tomorrow, what would we do?A. rainsB. were to rainC. would rainD. rain18. It is required that you ____ at six.A. will arriveB. arriveC. arrivedD. would arrive19. If only I _____ how to operate an electronic computer as you do.A. had knownB. would knowC. should knowD. knew20. He spoke in a quiet, distinct voice, as though his thought _____.A. was far awayB. had been far awayC. were far awayD. went far away.21. If it ___ rain, we ___ get wet.A. is to, shouldB. were to, wouldC. were going to, wouldD. was going to, should22. If he ___ to the teacher attentively, he ___ the answer to the problem now.A. had listened, would have knownB. listened, would knowC. listened, would have knownD. had listened, would know23. But for the party, he ___ of hunger 30 years ago.A. would have diedB. would dieC. must have diedD. must die24. ___ today, he would got there for holiday.A. Was he leavingB. Were he to leaveC. Would he leaveD. If he leaves25. I would have come earlier, but I ___ that you were waiting for me.A. didn’t knowB. hadn’t knowC. would have knownD. haven’t known26. It’s high time that we ___ to school.A. would toB. wentC. goD. will go27. It seems as if it ___ rain.A. willB. is going toC. is toD. were going to28. I’d rather you ___ right away.A. leaveB. leftC. will leaveD. to leave29. He is working hard for fear that he ___.A. failsB. failedC. would failD. fail30. It is really strange that the girl ___ so early.A. has been marriedB. has marriedC. be marriedD. would marry31. Supposing I ___ this gift, what would he say?A. acceptB. acceptedC. should acceptD. would accept32. The teacher agreed to the suggestion that the students ___ two weeks to prepare for the exam.A. giveB. should giveC. be givenD. would be given33. I was busy yesterday, otherwise I ___ your birthday party.A. attendedB. had attendedC. would attendD. would have attended34. He insisted that he ___ me before.A. seeB. should seeC. had seenD. saw35. The two strangers talked as if they ___ friends for years.A. wereB. would beC. have beenD. had been36. We ___ our lives had it not been for the policeman.A. would have lostB. should loseC. might loseD. could have lost37. ---- I thought you would come back tomorrow. ---- I would if I ___ to attend a meeting.A. don’t haveB. didn’t haveC. will not haveD. would not have38. He wishes ___ mistakes.A. he doesn’t always makeB. he isn’t always makingC. he didn’t always makeD. he wouldn’t always making39. It ___ very nice if only it were possible.A. will beB. would beC. isD. were40. Without your help, our team ___ the last match.A. won’t winB. will loseC. wouldn’t have wonD. can’t win41. I wish ___ I what to do.A. knewB. have knownC. knowD. would know42. ___, I would take an umbrella with me.A. Had I been youB. I were youC. Were I youD. I had been you43. If I had hurried, I ___ the train.A. would catchB. could catchC. would have caughtD. had caught44. He insisted that John ___ it.A. doB. doesC. didD. would do45. It is high time we ___ off.A. areB. wereC. beD. will be46. He felt as if he ___ more time to study for the test.A. needsB. were neededC. needed47. It is important that I ___ with Mr. Willians immediately.A. speakB. spokeC. will speakD. to speak48. James wishes he ___ the football game instead of the film.A. sawB. seeC. had been seenD. had seen49. I wish ___.A. he leftB. he leaves me aloneC. he be leftD. he would leave me alone50. If I had known that, I ___ so.A. wouldn’t doB. wouldn’t have doneC. won’t doD. have not done51. The doctor suggested that she ___.A. will not smokeB. not smokeC. would not smokeD. did not smoke52. If I ___ you, I wouldn’t retur n the call.A. beB. amC. was53. You talk as if you ___ there.A. were reallyB. has really beenC. had really beenD. would really be54. He suggested that the work ___ at once.A. would startedB. would be startedC. should startedD. should be started55. It is strange that such a thing ___ in your school.A. will happenB. happenC. should happenD. happened56. It is imperative that you ___ on time.A. areB. will beC. beD. would be57. I didn’t go to the party, but I do wish I ___ there.A. wasB. wereC. had beenD. went58. It is time we ___ up our results.A. sumB. summedC. will sumD. would sum59. If the doctor had been available, the child ___.A. would not dieB. would not have diedC. could not dieD. could not have died60. Dr. Bethune worked hard as if he ___.A. never had felt tiredB. had never felt tiredC. never felt tiredD. was tired never61. I enjoyed the movie very much. I wish I ___ the book from which it was made.A. have readB. had readC. should have readD. am reading62. You are late. If you ___ a few minutes earlier, you ___ him.A. came/ would meetB. had come/ would have metC. come/ will meetD. had come/ would met63. I wish my husband ___ as well as yours.A. had dressedB. dressC. will dressD. dressed64. Edison kept phosphorus carefully in a bottle lest it ___.A. would burnB. burnedC. was burningD. should burn65. He looked as if he ___ ill for a long time.A. wasB. wereC. has beenD. had been参考答案1——5 ADCDC 6——10 DBCCC 11——15 BDBBD 16——20 CBBDB 21——25 BDABA 26——30 BBBDC 31——35 BCDCD 36——40 ABCBC 41——45 ACCAB 46——50 CADDB 51——55 BDCDC 56——60 CCBBB 61——65 BBDDD。
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虚拟语气一. 虚拟语气在条件状语从句中的应用虚拟语气(Subjunctive Mood)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。
虚(win the first prize)的话，我会把奖金送给阿Sam。
If I won/should win/were to win the first prize in the Foshan University Students English Speaking Contest held in May, I would give my reward to Sam.If I win the first …, I will give …要是我爸是李嘉诚的话，我一定不用为钱发愁。
If my father were Li Jia Cheng, I wouldn’t worry about money.Were my father Li Jia Cheng, I wouldn’t …要是日本没有发生地震的话，我一定去放炸弹(blast)。
If Japan hadn’t had the earthquake, I would have blasted it.Hadn’t Japan had the earthquake, I …1要是将来我有钱了，我一定回来娶你。
If I were rich one day, I would marry you.→Were I rich one day, I …If I should be rich one day, I would marry you.→Should I be rich one day, I …If I were to be rich one day, I would marry you.→Were I to be rich one day, I …(If I am rich one day, I will marry you.)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。
1) If places ______ a like, there would be little need for geographers.A. beingB. areC. beD. were2) If I _____ the meaning of the word, I wouldn't have to look it up.A. knowB. knewC. knownD. knowing2. 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：1995年6月四级第46题We didn't know his telephone number, otherwise we _____ him,A) would have telephoned B) must have telephonedC) would telephone D) had telephoned3. 虚拟将来时是表示对将来实现的可能性很小的或不确定的假设。
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。
2例：1996年1月四级第44题Jean doesn't want to work right away because she thinks that if she ______ a job she probably wouldn't be able to see her friends very often.A. has to getB. had gotC. were to getD. could have got※二. 省略If的几种情况1. 当条件状语从句的谓语部分含有had、should、或were时，就将这样的词had、should、或were搬到句首把句子写成倒装句而将连词if省略。
例如：If you were the manager here, what would you do? 你若是这里的经理，你会怎么办？If he should act like that again, he would be fired immediately. 要是他再那样做，他会被立即解雇的。
2. 由某些介词短语取代了if引导的条件状语从句。
例如：Without air, there would be no life on the earth. 要是没有空气，地球上就不会有生命了。
But for your help, the little boy would have been drowned. 要是没有你们的帮助，那个小男孩早就淹死了。
We could have done the work better in that case. 要是那样的话，我们本可以把工作干得更好一些的。
3. 由上下文的交代而省略了if引导的条件状语从句。
在这种情况下，上下文事实上就是一个表示违背事实的条件句。
上下文如果是由一个句子介绍的，那么这个取代了if条件状语从句的句子应该用直陈语气；而起主句作用的句子则要用虚拟语气。
例如：He would have come to see you earlier but he just came back from his business trip .（本句中的上下文是：but he just came back from his business trip，表示：要是他在家没出差的话）他本来早就来看你了，可他却3出差刚刚回来。
But that you helped me, I would have failed in the experiment. （本句中的上下文是：But that you helped me，表示：要不是有你帮助我）要没有你帮助我，我的试验本做不成功的。
三. 虚拟语气的其它应用1. 在具有愿望、请求、建议、命令等主观意愿的动词(desire, demand, advise, 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。
例：1996年1月四级第28题It is politely requested by the hotel management that radios ______ after 11 o'clock at night.A. were not playedB. not be playedC. not to playD. did not play十八岁以下的未成年人不得观看限制级影片。
It is required that people under 18 shouldn’t watch/see X-rated films.→It is required that people under 18 not watch/see X-rated films.在电梯(elevator/lift)里不得吸烟。
It is required that smoking shouldn’t be allowed in the elevator.→It is required that smoking not be allowed in the elevator.在火警发生时，不得使用电梯。
It is required that the elevator shouldn’t be used in case of fire.→It is required that the elevator not be used in case of fire.2. 虚拟语气在表语从句和同位语从句中的应用在表示建议、请求、命令等主观意向的名词(suggestion, proposal, requirement, demand, desire, advice, order, insistence…) 作主语时，其后的表语从句或同位语从句中，需用虚拟语气。
谓语动词用(should)+动词原4形。
注意这种句型中的虚拟语气形式不受主句动词时态的影响。
例：1998年6月四级第68题We are all for your proposal that discussion _____.A. be put offB. was put offC. should put offD. is to put off3. 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：1993年6月四级第70题Look at the terrible situation I am in! If only I ____ your advice.A. followB. had followedC. would followD. have followedExercise1．If I were to have (have) time, I would join (join) you in the football match.If I had had time, I would have joined you in the football match.If I had time, I would join you in the football match.If I have time, I will join you in the football match.2．If I hadn’t been caught (not catch) by something, I would have come (come) to your party yesterday.3．If he had taken (take) my advice, he wouldn’t have made (not make) such a bad mistake.4．It is necessary that he should be send (send) to Beijing right away.5．If only I knew (know) the numbers of the next lottery!6．If the machine had been (be) in good conditions, we could/would have used (use) it in our last experiment.5。