英语二级考试语法重点.ppt

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1、英语二级考试语法重点,讲解,练习,重点,一.动词虚拟语气二.非谓语动词三.名词从句四.定语从句五.状语从句六.主语和谓语的一致七.倒装句八.情态动词九.强调,The Subjunctive Mood,1.英语动词有三种语气:陈述语气，祈使语气和虚拟语气。2.定义.用来表示说的话不是事实，或者是不可能 发生的情况，而是一种愿望，建议，假设的语气叫虚拟语气。,一：虚拟语气在非真实条件状语从句中的用法。,条件句有真实条件句和非真实条件句两种。真实条件句所表的假设是可能发生或实现的,是与事实相符的。,If it is fine tomorrow,I will go to visit my grandm

2、a.,非真实条件句所表的假设则是不可能或不大可能发生或实现的，与事实相反的情况。,2.If I were a bird,I would fly to America.,1.1虚拟语气在非真实条件句中的用法,用法举例,表示与现在事实相反的假设1.If I were you,I should go to see the doctor at once.2.If we knew his address,we could write to him.表示与过去事实相反的假设1.If you had come here yesterday,you would have seen him.2.If he ha

3、dnt been so busy,he would have helped you.,用法举例,表示与将来事实相反的假设1.If it were fine tomorrow,we would go for an outing.2.If I should do it,I would do it in a different way.*书面语中,如果条件句中的谓语动词含有系动词were 或助动词had,should,有时可将连词if 省略,而把were,had或should移到主语之前.如以上几例可变成:,用法举例,Were I you(=If I were you),I should go to

4、 see the doctor at once.Had you come here yesterday(=If you had come here yesterday),you would have seen him.Should I do it(=If I should do it),I would do it in an different way.,1.2虚拟语气在主语从句中的用法,句型:It is important/necessary/natural/vital/strange/advisable+that+主语+(should)+动词原形e.g.It is strange that

5、 she(should)do so.It is necessary that the problem(should)be solved immediately.,1.3虚拟语气在宾语从句中的用法,1)用于动词wish 后的that 从句中:这类虚拟语气主要表示愿望,that常省略.如果指现在或将来的愿望,从句用过去时;如果指过去没有实现或不可能实现的愿望,从句用过去完成时.,1.3虚拟语气在宾语从句中的用法,I wish I knew French.I wished that I had bought that skirt in Shanghai.注:动词wish 如果是过去式,后面宾语从句中

6、的虚拟语气形式不变,仍然用过去式或过去完成式.有时在宾语从句中可用would(might)+动词原形,表示有可能实现的愿望.e.g.I wish he would come,1.3虚拟语气在宾语从句中的用法,2.用于suggest 等动词后的that从句中:句型:suggest demand insist+that+主语+(should)+动词原形 propose order advisee.g.They insisted that the work(should)be started at once.,2.表示要求，命令，建议的虚拟语气。,常见动词：一个坚持，两个命令，三个建议，四个要求。1

7、.insist 2.order,command 3.advise,suggest,propose(recommend)4.demand,require,request,desireshould+动词原形，或者将should省略。,1.4虚拟语气在同位语从句和表语从句中的用法,用于order,suggestion,demand,request,proposal 等名词后面的同位语从句和表语从句中,从句的谓语动词应用should+动词原形,should可省略.1)用于同位语从句中:They received orders that they(should)start at once.2)用于表语从

8、句中Her proposal is that we(should)rest for half an hour.,1.5虚拟语气在状语从句中的用法,1)用于as if/as though引导的状语从句中:如果表示与现在事实相反,用过去时;表示与过去事实相反,用过去完成时.They love the boy as if he were their own child.She speaks as if she had been there before.2)用于lest(惟恐)引导的状语从句,谓语多用(should)+动词原形.例如:They spoke in whispers lest they(

9、should)be heard.,1.6 虚拟语气在 It is(high)time(that)句中的用法,表示“该是的时候了”,从句里的谓语动词用过去式.例如:Its time you went to bed.Its time we left.,1.7虚拟语气在 would rather that 句中的用法,Would rather意为“宁愿”(wish),从句里的谓语动词用过去时表示现在和将来,用过去完成时表示过去.例如:I would rather that you stayed with me.I would rather that you hadnt done it.,1.8虚拟语

10、气在含蓄条件句中的用法,1)由介词短语引起虚拟语气.Without electricity,there would not be modern industry.But for your timely help,we could not have caught the thief.2)由表示转折的连词引起虚拟语气.I was too busy yesterday.Otherwise,I would have come to see you.You should have handed in your term paper last week,but you didnt.I didnt catc

11、h the bus,or I wouldnt have come late.,1.9用于if only 感叹句中,If only 表示“但愿”“要是就好”,它的用法和I wish 基本相同.如与 would连用,则表示一时很难实现的愿望.If only he didnt write so carelessly!If only she had arrived in time.If only the rain would stop!,虚拟语气假设条件句型注意点：,1.假设条件从句谓语动词发生的时间与主句所假设的谓语动词不一致，叫做错综条件虚拟语气。主句和从句的谓语动词要依照假设的时间而定。,If

12、you _ the teachers advice,you _(be)in the hospital now.,had followed,wouldnt be,If I were you,I would have told him the news yesterday.(从句与现在事实相反,主句与过去事实相反),2.有的句子既没有条件从句,也没有介词短语表示条件,却含有条件含义,应注意虚拟语气的使用.Im really busy;otherwise I would certainly go with you.(.;if I werent so busy,.,3.假设条件虚拟倒装。条件从句中有s

13、hould，were，had三个助动词可以把if省略，并将这三个词提至句首。If I were you,I would give it up._,I would give it up.If it were not for your advice,we couldnt have got over the difficulties._,we couldnt have got over the difficulties.,Were I you,Were it not for your advice,If I had had time,I would have run round that lake

14、again._,I would have run round that lake again.If there should be a flood,what should we do?_,what should we do?,Had I had time,Should there be a flood,4.可以用介词短语代替条件从句:Without your help,we shouldnt have succeeded.(=If it hadnt been for your help,.)But for the storm,we would have arrived earlier.(=If

15、 it hadnt been for the storm,.),二：虚拟语气在宾语从句中的使用,Wish 的宾语从句,现在：过去：将来：,过去时（were）,过去完成时,would/could/might+V.should,I wish I _ a bird.（现在）I wish I _ such a mistake.（过去）We wish our parents _ us.（将来）,were,hadnt made,wouldnt punish,2.表示要求，命令，建议的虚拟语气。,常见动词：一个坚持，两个命令，三个建议，四个要求。1.insist 2.order,command 3.advi

16、se,suggest,propose(recommend)4.demand,require,request,desireshould+动词原形，或者将should省略。,我们建议Tom 去休息一下。他坚决要求我到场。国王命令囚犯明天要实施死刑。他们要求我们派他们去那儿工作。,We suggested that Tom(should)have a rest.,He insisted that I(should)be present.,The king ordered that the prisoners(should)be killed the next day.,They requested

17、that we(should)send them to work there.,注:insist表示“坚决认为某种事实”,suggest表示“暗示,使人联想”时,用陈述语气:He insisted that he was right.His look suggests that he is angry.由上述动词构成的名词,如带有表语从句或同位语从句,其谓语也用(should)+动词原形:My suggestion is that we(should)go there as soon as possible.The officer gave orders that all the soldie

18、rs(should)get there before.,虚拟语气的特殊句式,Its(about/high)time+that-,过去时,你该走了。,我们该去睡觉了。,Its high time that you went.Its high time that you were going.,Its time that we went to bed.,Would rather that,现在：过去：未来：,I would rather you paid me now.,I would rather you had gone,too.,Dont come.I would rather you ca

19、me tomorrow.,过去时,过去时,过去完成时,as if/though+Clause,现在：过去：,过去时,过去完成时,He looks as if he were drunk.,They talked as if they had been friends for years.,She loves the baby as if it were her own son.It seems as if it were spring.I remember the whole thing as if it had happened yesterday.,Its necessary/strang

20、e/natural/important+that-Clause 从句中的动词要用虚拟，即（should）+动词原形,It is important that we(should)master a foreign language.It is strange that she should refuse to come to the party.Its necessary that we should study hard.,1.It is suggested(ordered,requested,Proposed,desired.)that的结构中,谓语动词用should+动词原形(should

21、可省略):It was suggested that the work should be done at once.,without和but for 构成虚拟。but for要不是Without sunlight,peoples life would be different from today.But for your help,I wouldnt have finished the work.Without your help,I would have failed.But for water,it would be impossible to live in the desert.,

22、If only 要是就好了 If only I knew his name!If only we had followed your advice!If only I could see him again!,要是我们的父母能和我们住在一起就好了。要是我没错过火车就好了！,If only our parents could live with us!,If only I hadnt missed the train!,某些简单句的固定句型：Heaven help him!God bless you!May you succeed!Long live the Peoples Republic of China!,for fear that,in case,lest 引导的状语从句 Take an umbrella with you in case it should rain He ran away for fear that he should be caught by the police.He works hard lest he should fail.,用形容词，副词，名词来表示 A more careful man wouldnt have made such a mistake A fool would believe that.,