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1、if虚拟语气英语动词有三种语气：陈述语气、祈使语气、虚拟语气 虚拟语气的考点： 1.条件句中的虚拟语气的用法； 2.条件句中虚拟语气的倒装； 3.名词性从句中虚拟语气的用法； 4.几种特殊结构中虚拟语气的用法； 5.虚拟语气时态的判定。 一、If引导的虚拟条件句 区别： If it rains tomorrow，the crops will be saved. 陈述语气 If it rained tomorrow，the crops would be saved. 虚拟语气 真实条件状语从句与非真实条件状语从句 真：eg . If he doesnt hurry up, he will mis
2、s the bus. 如果他不快点，他将错过巴士。( 真实条件状语) If he is free, he will ask me to tell stories. 如果他是空闲的，他会要求我讲故事。 非真：eg. If I were you, I would go at once. 如果我是你，我马上就会去。 二、虚拟语气在条件从句中： 1.If you had come a few minutes earlier，you would have met him. 要是你早来几分钟的话，你就能见到他了。 2.If it were sunny tomorrow，i would come to se
3、e you. 明天要是天气好的话，我来看你。 3.If i were you，i would go at once. 假如我是你的话，我会马上走。 主从句的谓语形式 时间 现在 过去 将来 If从句的谓语形式 did/were had done 1.did/were 2.should do 3.were to do 主句的谓语形式 Would/could/should/might+V. 与现在事实相反的虚拟条件句 表示与现在事实相反的情况， 例1.If I were you, I would take an umbrella. 如果我是你，我会带把伞。 2.If I knew his tele
4、phone number, I would tell you. 如果我知道他的电话号码，我就会告诉你。 3.If there were no air or water, there would be no living things on the earth. 如果没有水和空气，地球上就不会有生物。(事实：地球上既有空气也有水) 4.If I had any money with me, I could lend you some. 如果我带钱了，我就会借给你些。 5.If he studied harder, he might pass the exam. 如果他再努力些，就能通过考试了。，
5、主+would/should/could/might+动词原形 与过去事实相反的虚拟条件句 例：1. If I had got there earlier, I should/could have met her. 如果我早到那儿，我就会见到她。 2.If he had taken my advice, he would not have made such a mistake. 如果他听我的劝告的话，就不会犯这样的错误了。 If+主+had done sth，主+would/should/could/might+动词完成式 表示对将来情况的主观推测 例： 1.If he should com
6、e here tomorrow, I should/would talk to him. 如果他哪天来这儿的话，我就跟他谈谈。 2.If there were a heavy snow next Sunday, we would not go skating. 如果下周日下大雪，我们就不能去滑冰了。 3.If she were to be there next Monday, I would tell her about the matter. 如果她下周一来这儿的话，我就会告诉她这件事的始末。 If+主+did，主+would/should/could/might+动词原形 有时，主句和条件
7、状语从句的谓语动作若不是同时发生时，虚拟语气的形式应作相应的调整 从句的动作与过去事实相反，而主句的动作与现在或现在正在发生的事实不符。如： If I had worked hard at school, I would be an engineer, too. 如果我在学校学习刻苦的话，我现在也会成为一个工程师了 If they had informed us, we would not come here now. 如果他们通知过我们的话，我们现在就不会来这里了。 从句的动作与现在事实相反，而主句的动作与过去事实不符。 如：If he were free today, we would h
8、ave sent him to Beijing. 如果他今天有空的话，我们会已经派他去北京了。I f he knew her, he would have greeted her. 要是他认识她的话，他肯定会去问候她了。 从句的动作与过去发生的情况相反，而主句的动作与现在正在发生的情况相反。如： If it had not been raining too much, the crops would be growing much better. 如果天不下太多的雨的话，庄稼会长得更好。 If he had been working hard, he would be working in t
9、he office now. 要是他一直努力工作的话，他现在已进了办公室了。 if虚拟句的倒装 当虚拟条件句的谓语动词含有were, should, had时，if可以省略，这时条件从句要用倒装语序，即将were, should, had等词置于句首，这种多用于书面语。如： Should he agree to go there, we would send him there. 要是他答应去的话，我们就派他去。 Were she here, she would agree with us. 如果她在这儿的话，她会同意我们的。 Had he learnt about computers, we
10、 would have hired him to work here. 如果她懂一些电脑知识的话，我们已经聘用他来这里工作了。 如果条件状语中有were，had，should时，可以倒装成：were/should/had+主+其他 If i were you，i would try it again. 如果我是你，我会再试一次。 Were i you, If he had been there yesterday，he would have seen the film. Had he been there yesterday, If it should snow tomorrow,we wou
11、ldnt go out. Should it snow tomorrow, 非真实条件句中的条件从句有时不表达出来，只暗含在副词、介词短语、上下文或其他方式表示出来，这种句子叫做含蓄条件句，在多数情况下，条件会暗含在短语中，如without., but for.等 But for his help, we would be working now. 要不是他的帮助，我们还会在工作呢。 Without your instruction, I would not have made such great progress. 要是没有你的指导，我不会取得如此大的进步。 We didnt know h
12、is telephone number; otherwise we would have telephoned him. 我 们不知道他的电话号码，否则我们就会给他打电话。 有时，虚拟条件句中，主、从句可以省略其中的一个，来表示说话人的一种强烈的感情。 省略从句 He would have finished it. 他本该完成了。 You could have passed this exam. 你应该能通过这次考试了。 省略主句 If I were at home now. 要是我现在在家里该多好啊。 If only I had got it. 要是我得到它了该多好啊。 1.the exam
13、，he would have attend a college. A.If he passed B.Had he passed C.Were he passed D.If he should pass 2.five minutes earlier，you could have seen them off. A.If you should arrive B.If you arrive C.Had you arrive D.Should you arrive 翻译句子： 1.If _(如果明天不下雨的话), we will go to the zoo. 2_(如果你生病了), you must s
14、ee the doctor. 3. Youll have to have a rest _ 4 _(如果我们训练海豚), they perform tricks. 5 Parrots repeat words _ (如果你教他们) 6_(如果老虎住在野外), they will hunt for their own food . 7. If you do not hurry up, _.(你会上学迟到). 练习以及解析 1.I enjoyed the movie very much. I wish I _ the book from which it was made. A. have rea
15、d B. had read C. should have read D. are reading 2.You are late. If you _ a few minutes earlier, you _ him. A. come; would meet B. had come; would have met C. come; will meet D. had come; would meet 3.The two students talked as if they _ friends for years. A. should be B. would be C. have been D. ha
16、d been 5.He looked as if he _ ill for a long time. A. was B. were C. has been D. had been 7.I wish that I _ with you last night. A. went B. could go C. have gone D. could have gone 9.I cant stand him. He always talks as though he _ everything. A. knew B. knows C. has known D. had known 10._ the fog,
17、 we should have reached our school. A. Because of B. In spite of C. In case of D. But for 11.If you had told me in advance, I _ him at the airport. A. would meet B. would had met C. would have met D. would have meet 12.Mike can take his car apart and put it back together again. I certainly wish he_
18、me how. A. teaches B. will teach C. has taught D. would teach 16.He suggested that they _ use a trick instead of fighting. A. should B. would C. do D. had 17.My father did not go to New York; the doctor suggested that he _ there. A. not went B. wont go C. not go D. not to go 19.Would you rather I _
19、buying a new bike? A. decided against B. will decide against C. have decided D. shall decide against 20.You look so tired tonight. It is high time you _. A. go to sleep B. went to sleep C. go to bed D. went to bed 21.Why didnt you buy a new car? I would have bought one if I _ enough money. A. had B.
20、 have had C. would have D. had had 22.If she could sew, _. A. she make a dress B. she would have made a shirt C. she will make a shirt D. she would had made a coat 24.His doctor suggested that he _ a short trip abroad. A. will take B. would take C. take D. took 25.The Bakers arrived last night. If t
21、heyd only let us know earlier,_ at the station. A. wed meet them B. well meet them C. wed have met them D. weve met them 26.If I _ you, I _ more attention to English idioms and phrases. A. was; shall pay B. am; will pay C. would be; would pay D. were; would pay 27.We might have failed if you _ us a
22、helping hand. A. have not given B. would not give C. had not given D. did not give 28.The law requires that everyone _ his car checked at least once a year. A. has B. had C. have D. will have 29.It is strange that he _ so. A. would say B. would speak C. should say D. will speak 30.Had I known her na
23、me, _ 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. 翻译句子： 1. it doesnt rain tomorrow 2. If you are ill 3. if you feel tired 4. If we train dolphins 5. if you teach them 6. If tigers live in the wild 7. you will be late for scho
24、ol 15 BBDD 610 DAD 1115 CD 1620 ACAD 2125 DBCCC 2630 DCCCD 3135 DDCCB 3640 DCACD 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。 2.条件句表示与过去事实相反，主句用过去将来完成时，从句用过去完成时。 3.as if后面如果表示真实情况就不用虚拟。 5.as if后面是真实情况，不虚拟。 7.could have done表示“本来可以”。 9.as if表示不可能发生的事情时用虚拟语气。 本句as though后面是与现在相反的虚拟语气 所以用 一般过去时. 10.but for表示“要不是
25、的话”，通常与虚拟语气搭配使用。 11.in advance表示“事先”，表示与过去事实相反的虚拟语气。 12.wish的宾语从句表示发生在将来的愿望用过去将来时。 16.suggest后面的宾语从句用sb. should do的形式。 17.suggest后面的从句用sb. should do的形式，should可以省略。 19.would rather的宾语从句用sb. did的形式。 20.It is time后面的定语从句用sb. did的形式。 Its time + that 时，that可省略，time可由high,about修饰，从句中的谓语动词有两种形式，或者用动词的过去式(b
26、e用were); 或者用shoud + 动词原形（should不能省略)。此句型为虚拟语气句型，表示“现在某人该做某事了”。 21.第一个had是过去完成时，第二个had表示“有”。 22.would have done是过去将来完成时，表示与过去相反的虚拟语气。 24.suggest后面的从句用sb. should do的形式，should可以省略。 25.表示与过去事实相反，主句用过去将来完成时。 26.在虚拟语气中，不管什么人称，be动词都要用were的形式。 27.表示与过去事实相反，从句用过去完成时。 28.require后面的从句用sb. should do的形式，should可以省略。 29.It is strange that是主语从句的虚拟语气，从句用sb. should do的形式。 30.had I known是与过去相反的虚拟语气的倒装形式。
