江蘇省永豐初級中學(xué)中考英語專題復(fù)習(xí) 虛擬語氣課件

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1、虛擬語氣：虛擬語氣：一、概念：一、概念： 虛擬語氣用來表示說虛擬語氣用來表示說 話人的主觀愿望或假想，話人的主觀愿望或假想，所說的是一個條件，不一所說的是一個條件，不一定是事實，或與事實相反。定是事實，或與事實相反。 二、二、 在條件句中的應(yīng)用：在條件句中的應(yīng)用： 條件句可分為兩類，條件句可分為兩類，一類為真實條件句，一類一類為真實條件句，一類為非真實條件句。非真實為非真實條件句。非真實條件句表示的是假設(shè)的或條件句表示的是假設(shè)的或?qū)嶋H可能性不大的情況，實際可能性不大的情況，故采用虛擬語氣。故采用虛擬語氣。1、 真實條件句：真實條件句： 真實條件句用于陳述語氣，真實條件句用于陳述語氣，假設(shè)的情況

2、可能發(fā)生，其中假設(shè)的情況可能發(fā)生，其中 if 是是如果的意思。如果的意思。時態(tài)關(guān)系：時態(tài)關(guān)系： 句型：條件從句句型：條件從句 主句主句 一般現(xiàn)在時一般現(xiàn)在時shall/will + 動詞原形動詞原形 例如：例如：If he comes, he will bring his violin. 典型例題：典型例題：The volleyball match will be put off if it _. A. will rain B. rains C. rained D. is rained答案答案B。真實條件句主句為將真實條件句主句為將來時，從句用一般現(xiàn)在時。來時，從句用一般現(xiàn)在時。 注意：注意：

3、（1） 在真實條件句中，主句不能用在真實條件句中，主句不能用be going to表示將來，該用表示將來，該用shall, will. (錯錯) If you leave now, you are never going to regret it. (對對) If you leave now, you will never regret it. （2） 表示真理時，主句謂語動詞便表示真理時，主句謂語動詞便不用不用shall (will) +動詞原形，而直接動詞原形，而直接用一般現(xiàn)在時的動詞形式。用一般現(xiàn)在時的動詞形式。2、非真實條件句：、非真實條件句：（1）時態(tài)：可以表）時態(tài)：可以表示過去，現(xiàn)

4、在和將來示過去，現(xiàn)在和將來的情況。它的基本特的情況。它的基本特點是時態(tài)退后。點是時態(tài)退后。a. 同現(xiàn)在事實相反的假設(shè)。同現(xiàn)在事實相反的假設(shè)。句型句型 ：條件從句：條件從句 主句主句 一般過去時一般過去時 should( would) +動詞原形動詞原形 例如：例如：If they were here, they would help you. b. 表示于過去事實相反的假設(shè)。表示于過去事實相反的假設(shè)。句型：條件從句句型：條件從句 主句主句 過去完成時過去完成時 should (would) have+ 過去分詞過去分詞 If she had worked harder, she would h

5、ave succeeded. The rice would not have been burnt if you had been more careful. If my lawyer had been here last Saturday, he would have prevented me from going. If he had come yesterday, I should / would have told him about it. 含義：含義：He did not come yesterday, so I did not tell him about it. If he h

6、ad not been ill and missed many classes, he would have made greater progress. 含義：含義： He was ill and missed many lessons, so he did not make greater progress. c.表示對將來的假想：表示對將來的假想：句型：條件從句主句句型：條件從句主句 一般過去時一般過去時should+ 動詞原形動詞原形 were+ 不定式不定式 would + 動詞原形動詞原形 should+ 動詞原形動詞原形 If you succeeded, everything

7、would be all right. If you should succeed, everything would be all right. If you were to succeed, everything would be all right. 3、 混合條件句：混合條件句：主句與從句的動作發(fā)生在不同的時間，主句與從句的動作發(fā)生在不同的時間，這時主，從句謂語動詞的虛擬語氣形式這時主，從句謂語動詞的虛擬語氣形式因時間不同而不同，這叫做混合條件句。因時間不同而不同，這叫做混合條件句。If you had asked him yesterday, you would know what

8、to do now. （從句與過去事實相反，主句與現(xiàn)在事（從句與過去事實相反，主句與現(xiàn)在事實相反。）實相反。） If it had rained last night (過去過去), it would be very cold today (現(xiàn)在現(xiàn)在). 4、 虛擬條件句的倒裝：虛擬條件句的倒裝：虛擬條件句的從句部分如虛擬條件句的從句部分如果含有果含有were, should, 或或had, 可將可將if省略，再把省略，再把were, should或或had 移到從句句首，移到從句句首，實行倒裝。實行倒裝。Were they here now, they could help us. =If

9、they were here now, they could help us. Had you come earlier, you would have met him. =If you had come earlier, you would have met him. Should it rain, the crops would be saved. =Were it to rain, the crops would be saved. 注意：注意：在虛擬語氣的從句中，動詞在虛擬語氣的從句中，動詞be的的過去時態(tài)一律用過去時態(tài)一律用 “were”，不用，不用was， 即在從句中即在從句中be

10、用用were代替。代替。If I were you, I would go to look for him. 如果我是你，就會去找他。如果我是你，就會去找他。 If he were here, everything would be all right. 如果他在這兒，一切都會如果他在這兒，一切都會好的。好的。 典型例題：典型例題：_ to do the work, I should do it some other day. A. If were I B. I wereC. Were I D. Was I 答案答案C. 在虛擬條件狀語中如果有在虛擬條件狀語中如果有were, should,

11、had這三個詞，通常將這三個詞，通常將if省略，主語提前省略，主語提前, 變成變成 were, should, had +主語的形式。但要注意，主語的形式。但要注意，在虛擬條件狀語從句中，省略連詞的倒裝形式在虛擬條件狀語從句中，省略連詞的倒裝形式的句首不能用動詞的縮略形式。如我們可說的句首不能用動詞的縮略形式。如我們可說 Were I not to do., 而不能說而不能說 Werent I to do.5、特殊的虛擬語氣詞：、特殊的虛擬語氣詞：should。（1） It is demanded / necessary / a pity + that結(jié)構(gòu)中的主語從句的謂語動詞要結(jié)構(gòu)中的主語從

12、句的謂語動詞要用用should 加動詞原形，加動詞原形， should 可省略?？墒÷?。句型：句型： suggested It is importantthat+ (should) do a pity (1) suggested, ordered, proposed, required, demanded, requested, insisted； + (should) do (2) important, necessary, natural, strangea pity, a shame, no wonder(3)It is suggested that we (should) hold a

13、 meeting next week.It is necessary that he (should) come to our meeting tomorrow. （2）在賓語從句中的應(yīng)用：）在賓語從句中的應(yīng)用：在表示命令、建議、要求等一類動詞后在表示命令、建議、要求等一類動詞后面的從句中。面的從句中。 order, suggest, propose, require, demand, request, insist, command, insist + (should) do I suggest that we (should) hold a meeting next week. He in

14、sisted that he (should ) be sent there. 注意：注意：如如suggest, insist不表示不表示 建議建議 或或堅持要某人做某事時堅持要某人做某事時，即它們用于其本意即它們用于其本意暗示、表暗示、表明明、堅持認(rèn)為堅持認(rèn)為時，賓語從時，賓語從句用陳述語氣。句用陳述語氣。The guard at gate insisted that everybody obey the rules. 判斷改錯判斷改錯: （錯）（錯）You pale face suggests that you (should) be ill. (對對) Your pale face su

15、ggests that you are ill. (錯錯) I insisted that you ( should) be wrong. (對對) I insisted that you were wrong. （3）在表語從句，同位語從句中的應(yīng)用。）在表語從句，同位語從句中的應(yīng)用。在在suggestion, proposal, idea, plan, order, advice等名詞后面的表語從句、等名詞后面的表語從句、同位語從句中要用虛擬語氣，即同位語從句中要用虛擬語氣，即（should）+動詞原形。動詞原形。 My idea is that we (should) get more p

16、eople to attend the conference. I make a proposal that we (should) hold a meeting next week.6、wish的用法。的用法。（1）用于）用于wish后面的從句，表示與后面的從句，表示與事實相反的情況，或表示將來不太事實相反的情況，或表示將來不太可能實現(xiàn)的愿望。其賓語從句的動可能實現(xiàn)的愿望。其賓語從句的動詞形式為：詞形式為： 真實狀況真實狀況 wish后后 從句動作先于主句動詞動作從句動作先于主句動詞動作 現(xiàn)在時過去時現(xiàn)在時過去時（be的過去式為的過去式為 were） 從句動作與主句動作同時發(fā)生過去時過去完成

17、時從句動作與主句動作同時發(fā)生過去時過去完成時（had + 過去分詞）過去分詞）將來不大可能實現(xiàn)的愿望將來時將來不大可能實現(xiàn)的愿望將來時would/could +動詞原形動詞原形例如例如:I wish I were as tall as you.我希望和你一樣高。我希望和你一樣高。He wished he hadnt said that. 他希望他沒講那樣的話。他希望他沒講那樣的話。 I wish it would rain tomorrow. 我希望明天下雨就好了。我希望明天下雨就好了。 (2)Wish to do表達法。表達法。Wish sb. / sth. to do I wish to

18、see the manager. = I want to see the manager. I wish the manager to be informed at once. (= I want the manager to be informed at once.)7、比較、比較if only與與only if。only if表示表示“只有只有”；if only則表示則表示“如果如果就好了就好了”。If only也可也可用于陳述語氣。用于陳述語氣。I wake up only if the alarm clock rings. 只有鬧鐘響了，我才會醒。只有鬧鐘響了，我才會醒。 If onl

19、y the alarm clock had rung.當(dāng)時鬧鐘響了，就好了。當(dāng)時鬧鐘響了，就好了。 If only he comes early.但愿他早點回來。但愿他早點回來。8、It is (high) time that。It is (high) time that 后面的從句謂后面的從句謂語動詞要用過去式或用語動詞要用過去式或用should加動加動詞原形，但詞原形，但should不可省略。不可省略。It is time that the children went to bed. It is high time that the children should go to bed.9、

20、need “不必做不必做”和和“本不該做本不該做”。didnt need to do表示：表示： 過去過去不必做某事不必做某事, 事實上也沒做。事實上也沒做。neednt have done表示：表示： 過過去不必做某事去不必做某事, 但事實上做了。但事實上做了。 例如：例如：John went to the station with the car to meet Mary, so she didnt need to walk back home. 約翰開車去車站接瑪麗，所約翰開車去車站接瑪麗，所以她不必步行回家了。以她不必步行回家了。 John went to the station wi

21、th the car to meet Mary, so she neednt have walked back home. 約翰開車去車站接瑪麗，所約翰開車去車站接瑪麗，所以她本不必步行回家了。以她本不必步行回家了。 (Mary步行回步行回家，沒有遇上家，沒有遇上John的車。的車。) 典型例題：典型例題：There was plenty of time. She _. A. mustnt have hurried B. couldnt have hurriedC. must not hurry D. neednt have hurried答案答案D。neednt have done. 意為意為 本本不必不必，即已經(jīng)做了某事，而，即已經(jīng)做了某事，而時實際上不必要。時實際上不必要。Mustnt have done 用法不正確，用法不正確，對過去發(fā)生的事情進行否定性推對過去發(fā)生的事情進行否定性推斷應(yīng)為斷應(yīng)為couldnt have done, 不可不可能已經(jīng)能已經(jīng)。 must not do 不可以不可以（用于一般現(xiàn)在時）。（用于一般現(xiàn)在時）。Homework:按照虛擬語氣按照虛擬語氣的用法造句。的用法造句。