《高考语法复习虚拟语气》.ppt

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1、l虚拟语气表示说话人的愿望/假设/猜测/或建议，而不表示客观存在的事实。虚拟语气通过谓语动词的特殊形式来表示。l1 .虚拟语气用于条件状语从句。l（1）与现在事实相反。lIf I had time ,I would go to the cinema with you .l（2）与过去事实相反。lIf he had caught the first bus this morning,he would not have been late for class.l（3）与将来事实相反。lIf it were to /should rain tomorrow,the meeting would be

2、put off. 条件从句中的谓语动词的形式主句中的谓语动词的形式与过去事实相反had+过去分词should/would+ have+过去分词与现在事实相反过去式should/would+动词原形与将来事实相反1.过去式should/would+动词原形2.should+动词原形should/would+动词原形3.were to+动词原形Should/would+动词原形l注意：主句中的should通常用于第一人称，would可用于任何人称，同时也可根据意思用情态动词could/might 等代替should /would。l(4)有时候，条件从句表示的动作和主句表示的动作，发生的时间是不一

3、致的（如一个是过去发生的，一个是现在发生的）。这时，动词的形式要根据它所表示的时间来调整。-(错综时间条件句)l1.If the weather had been more favourable ,lthe crops would be growing still better.l2.If you were in better health ,we would have allowed you to join them in the work.l3.If we hadnt got everything ready by now,we should be having a terrible ti

4、me tomorrowl(5)以上句型可以转换成下列形式:lA.若if从句中有 were/ had/ should ，可把它们倒装放到主语之前，省略if .句式:l were /had /should +主语主语 +其它成分其它成分.lWere I in school again ,I would work harder.lHad you been here earlier ,you would have seen him.lShould there be a meeting tomorrow ,I would come .lB.用介词短语代替条件状语从句.例如:lWithout air ,t

5、here would be no living things .lI would not have succeeded but for your help.l2.虚拟语气用于宾语从句l（1）“wish + 宾语从句”表示不能实现的愿望，“可惜/悔不该/但愿”从句中谓语动词形式：l与现在事实相反：动词过去式l与过去事实相反: had + done 或l could(would)+have +donel与将来事实相反： could/would + do 例如：l.I wish you told me earlier.lWe wish we had arrived there two hours e

6、arlier. I wish we could go to the seaside today/tomorrowl(2)虚拟语气在动词:linsist （坚持）/demand/ desire / request / require/ order /propose / command / ask / advise / prefer /suggest（建议）arrange 等后面的宾语从句中，用 “（should） +动词原形”。如：lThe doctor ordered that she (should) stay in bed for a few days.lThey demanded tha

7、t the black people (should) be treated as well as white people.l I insisted that you give me money back.l Mike insisted that he had never stolen anything.l The girl insisted that she gave me the money the other day.l I suggested that the meeting (should) be put off.l Her pale face suggested that she

8、 was ill.l3.虚拟语气用于表语从句/同位语从句.l作advice / idea /order /demand /plan /proposal /suggestion /request 等后面的宾语从句和同位语从句，其谓语动词要用虚拟语气的结构“（ should ) + 动词原形” .例如：lWe all agreed to his suggestion that we (should) go to Beijing for sightseeing.lMy idea is that he (should) do exercises first.l4。虚拟语气用于以 as if / as

9、though 引导的表语从句或状语从句.谓语动词的形式有三种： as if /as though 引导的表语/状语从句从句中谓语动词的形式1.从句表示与现在事实相反谓语动词用一般过去式2.从句表示与过去事实相反 had + 过去分词3.从句表示与将来事实相反 would /might /could + 动词原形l例如：lHe looked at me as if I were mad.lHe speaks English so fluently as if he had studied English in England.lIt looks as if it might rain .l但as

10、 if /as though 后的从句也常用陈述语气，这是因为从句中的情况往往是可能发生的或可能被设想为真实的。例如：lIt looks as if our side is going to win .l5.虚拟语气用于主语从句。l在主语从句中，谓语动词的虚拟语气结构用“should + 动词原形”的结构，表示惊讶/ 不相信 /惋惜 /理应如此等。例如：lIt is necessary ( important /natural /desirable 想要的/advisable 明智的/合理的/适当的/可行的/strange ,etc.) that we should clean the roo

11、m every day .lIt was a pity (a shame /no wonder ,etc.) that you should be so careless .lIt will be desired (suggested /decided /ordered /requested / proposed ,etc.) that she should finish her homework this afternoon.l在上述三种主语从句中，should 意为“应该/竟然”，可以省去，但不可换用 would 。主句所用动词的时态不限。l注意: 这种从句表示的事实。如果说话人对这种事实

12、表示惊奇，就用虚拟语气。反之，如果不表示惊奇， that 从句也可用陈述语气。例如:lIt is strange that he did not come yesterday .lIt is a pity that you cant swim .l6.虚拟语气用于定语从句l这种从句常用 “It is (high ) time (that ) ”在句型中，定语从句的谓语动词用过去式，或 should动词原形(should不能省略,be 用were来)表示，意为“（现在）该”l例如：lIt is time that I went and picked up my little girl from

13、school.lIt is high time we were going.l7.虚拟语气用于if only 引导的感叹句：lIf only I had taken his advice .lIf only I were a bird .l8.虚拟语气用于If it were not for 此结构意为“如果没有”，表示与现在事实相反的假设lIf it had not been for “如果当时没有”，表示与过去事实相反的假设l例如：lIf it were not for the rain ,the crops should /would die . If it had not been f

14、or your timely help ,I would have failed. 9.虚拟语气在would rather 后面的从句中： A.从句用过去时指现在。 B.从句用过去时指将来。 C.从句用过去完成时指过去。例如 ： I would rather you paid me now. I would rather they came tomorrow. Id rather she hadnt done that.l10.虚拟语气用于简单句。lA .表示说话人谦虚/客气/有礼貌，是语气委婉，常出现在日常会话中。例如：lIt would be better for you not to s

15、tay up too late.lWould you be kind enough to open the door ?lB.用于一些习惯表达法中。例如：lWould you like a cup of tea ?lYou had better go now.lC.用 “may + 动词原形”，表示“祝愿/但愿”。May 须置于句首。例如:lMay you be happy ! May you succeed !l11.含蓄条件句l在某些虚拟语气结构中没有 if 条件句，虚拟条件是用其它形式表现出来，这种现象在语法上称为“含蓄条件句”具体分为一下几种情况：l1）通过动词不式短语表示条件例如：l

16、You would be a fool to refuse his offer.(=If you should refuse his offer ,you would be a fool .)l2)通过介词短语表达条件例如：lBut for the storm I would have arrived much earlier.(=If it had not been the storm)l3)通过连词otherwise / or /but /that /though /once等表达条件例如：lShe came to town yesterday ,otherwise /or I would

17、 not have met her .(=if she had not come )lI would have attended the meeting ,but I have been too busy . (= if I had not been too busy )l4)通过 Were it not for 或 l Had it not been for 等句式表达条件例如：lWere it not for(=If it were not for ) the leadership of the Party ,we could not live a happy life.lHad it n

18、ot been for (=If it had not been for ) the leadership of the Party ,we should have failed.l5)通过分词短语表达条件例如：lGiven more attention ,the crops could have grown better.(=If they had been given more )l6)无词句暗示条件例如：lSuch mistakes could have been avoided .这种错误本来可以避免的l(暗含条件从句if we had been more careful.)lIt w

19、as so quiet ,you could have heard a pin drop .是那样的安静，掉根针你都听得见l(暗含条件从句if it had dropped to the ground.)l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.l2） 表示真理时，主句谓语动词便不用shall (will) +动词原形，而直接用一般现在

20、时的动词形式。l1. The volleyball match will be put off l if it _.A.will rain B. rains lC. rained D. is rained注意：在虚拟语气的从句中，动词be的过去时态一律用were，不用was， 即在从句中be用were代替。 If I were you, I would go to look for him. 如果我是你，就会去找他。 If he were here, everything would be all right. 如果他在这儿，一切都会好的。l2. _ to do the work, I sho

21、uld do it some other day.A. If were I B. I werelC. Were I D. Was I l在虚拟条件状语中如果有were, should, had这三个词，通常将if省略，主语提前, 变成 were, should, had +主语的形式。但要注意，在虚拟条件状语从句中，省略连词的倒装形式的句首不能用动词的缩略形式。如我们可说 Were I not to do., 而不能说 Werent I to do.l判断改错: (错) You pale face suggests that you (should) be ill. (对) Your pale

22、 face suggests that you are ill. (错) I insisted that you ( should) be wrong. (对) I insisted that you were wrong.l3. There was plenty of time. She _. A. mustnt have hurried B. couldnt have hurriedC. must not hurry D. neednt have hurried l4. But for the leadership of our Party, we _.A. could not have

23、succeeded lB. should not have succeeded l 5.What do you think of his proposal that improvements _ in the old type of vacuum cleaner? a. be made b. will be made l c. would be made d. will have to be madel6._your help, we couldnt have done our job so successfully.lA. without B. But C. if it were not f

24、or D. with l7.it rain tomorrow,we would have to put off the visit to the Yangpu Bridge.A. were B.should C. would D. will8.-Look! It looks as if it _going to rain.We must hurry .-OK. l A. is B. were C. was D. arel9._, the experiment should have been successful.A. Given more time B.If they are given m

25、ore time10._the flood, the ship would have reached its destination on time.A. In case of B. But for l11.Who would you rather_with you ,he ro she?A. went B. go l12.-Why were you late for the lecture yesterday? -Because my car _down on the way. Otherwise I _earlier. A. had broken, would arrive l B. broke, would have arrived