初中英语虚拟语气.doc
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1、初中英语虚拟语气 英语中的语气分为陈述语气、祈使语气、虚拟语气三类。虚拟语气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。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。如果假设的情况可能发生,是真实条件句,这种情况下谓语用陈述语气。如: If time permits, well go fishing together. 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。如: If you had come yesterday, you would have met that fam
2、ous professor.(隐含的事实是:你昨天没来,也没见到那位著名教授)。虚拟语气的基本形式和用法在含有虚拟条件句的复合句中,主从句的谓语都要用虚拟语气。1.含有条件状语从句的复合句wish(wouldrather)+宾语从句suggest()+宾语从句2.主语从句Itis+adj./p.p/n.+that+S+(should)+do表语从句S+isthat+s+(should)+do同位语从句S+that+s+(should)+do3.定语从句Itis(high)timethat+S+didI.含有条件状语从句的复合句(以do为例;S=主语)时间条件状语从句主句与现在事实相反的假设If
3、+S+didS+would/should/could/might+do与过去事实相反的假设If+S+haddoneS+would/should/could/might+havedone与将来事实相反的假设didIf+SshoulddoS+would/should/could/might+doweretodo注意事项:1倒装句。如果条件句中含有功能词had,should,were时,可以省去If,把功能词提前,构成倒装句。2错综条件句。若条件句和主句动作不存在同一个时间,则谓语形式应根据具体情况而定。3Iftherewerent/hadnotbeen+=without4Ifitwerenotfo
4、r/Ifithadntbeenfor=butfor5otherwise+虚拟语气的句子6虚拟语气的句子,but+陈述事实的句子虚拟语气表示一种假设的情况,或一种主观的愿望,即动词所表示的动作或状态并非事实,或不可能实现。一一般情况下,英语虚拟语气的形式有下列3种: 语境条件从句主句 例子1.与现在事实相反一般过去式:were/didwould/should/could/might + do(动词原形)If John had the time, he would make a trip to China to see the Great Wall.If I were you, I would g
5、ive up drinking immediately.2.与将来事实相反(1). should+动词原形(2).一般过去式:were/did(3)、were to+动词原形would/should/could/might + do(动词原形)If you should lose, what would you do?If I were to see her tomorrow, I would tell her the truth.If you went there next time, you would see what I mean.3.与过去事实相反过去完成时:had+过去分词woul
6、d/should/could/might+ have doneIf I had arrived earlier, I would have seen David二.、虚拟语气的几种特殊用法1.虚拟语气的倒装: 将if去掉,谓语动词提前。如:If I were you, I would give up drinking. =Were I you, I would give up drinking.If I had arrived earlier, I would have seen David. = Had I arrived earlier, I would have seen David.2
7、. 有时条件从句中的动作和主句中的动作发生的时间不一致,如:If he had followed the doctors advice, he would be quite all right now.(if从句是对过去的虚拟,主句是对现在的虚拟。)If I were you, I would have gone home.(if从句是对现在的虚拟,主句是对过去的虚拟。)三虚拟语气的其他用法1、Suggest, advise 等表示“要求”“建议”的动词之后宾语从句须用虚拟语气,其句子结构如下:suggest, advise, recommend, demand, require, insis
8、t, urge, request, order, +that(should )+动词原形ask, move, propose等注意:在此结构中that不可省略;should省不省均可。He suggested that they (should ) stop smoking.上述动词的名词形式出现时,that 引导的从句仍用虚拟语气。He made a request that they (should ) stop smoking.注意:* insist有两个意思,当表示“坚持让某人做某事”(含命令口吻)时,that从句用虚拟,如:He insists that we (should) go
9、 home now.当表示“坚持某种说法”时,that从句用陈述语气。He insists that he is right.*suggest也有两个意思,当表示“建议”时,that从句用虚拟语气,如:I suggest that we should go home now.当表示“暗示”时,that从句用陈述语气。如:All the evidence suggests that he stole the money. 所有证据偶读暗示是他偷了钱。2、It is (was )+necessary, a pity 等+that引导的从句须用虚拟语气,其句子结构如下: imperative, ad
10、visable, 动词完成式It is (was) + important, natural, necessary, +that(should) +essential, strange,等 动词原形 It is important that you (should) follow the doctors orders.It is right that you should have done your homework.3、wish的用法主句谓语动词that 从句谓语动词例子现在的愿望:wish/wishes一般过去式:did或wereI wish I were as tall as you.
11、 我希望和你一样高。过去的愿望:wished过去完成式:had doneI wished I had never stopped teaching. (=I am sorry I stopped teaching.)对将来的愿望:wish/wisheswould/could +动词原形I wish it would rain tomorrow. 我希望明天下雨就好了。注意:wish与hope接宾语从句的区别在于:hope表示一般可以实现的希望,宾语从句用陈述语气。wish表示很难或不大可能实现的希望,宾语从句用虚拟语气。试比较:(1) We hope they will come,(We do
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