高考英语名词性从句讲解.doc

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1、高考英语名词性从句讲解【考情分析】名词性从句是历年高考的重点和难点也是热点。名词性从句相当于名词，可用作主句的主语、表语、宾语和同位语。因此，名词性从句分为主语从句、表语从句、宾语从句和同位从句。今后对名词性从句的考查仍将集中在关联词的选用上，特别是对what引导的名词性从句的考查。名词性从句与其他从句的混合考查将在今后高考中占据一席之地。【知识点归纳】名词性从句的用法在句子中起名词作用的句子叫名词从句(Noun Clauses）。 名词从句的功能相当于名词词组,它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语

2、从句和同位语从句。一、引导名词性从句的连接词引导名词性从句的连接词可分为三类：连词：that（无任何词意）；whether, if（均表示“是否”表明从句内容的不确定性）；as if ,as though（均表示“好像”，“似乎”）。以上在从句中均不充当任何成分连接代词：what, whatever, who, whoever, whom, whose, which. Whichever, whomever连接副词：when, where, how, why二、具体分类1.主语从句作句子主语的从句叫主语从句。主语从句通常由从属连词that，whether，if和连接代词what，who，whi

3、ch，whatever，whoever以及连接副词how，when，where，why等词引导。that在句中无词义，只起连接作用；连接代词和连接副词在句中既保留自己的疑问含义、又起连接作用，在从句中充当从句的成分。例如：What he wants to tell us is not clear.他要跟我们说什么，还不清楚。Who will win the match is still unknown.谁能赢得这场比赛还不得而知。It is known to us how he became a writer.我们都知道他是如何成为一名作家的。Where the English evening

4、 will be held has not yet been announced.英语晚会将在哪里举行，还没有宣布。【典例1】(2009上海卷)It is immediately clear _ the financial crisis will soon be over.A. sinceB. whatC. whenD. whether【典例2】(2008山东卷)_ was most important to her, she told me, was her family.A. ItB. ThisC. WhatD. As【典例3】(2009天津卷)It is obvious to the s

5、tudents _ they should get well prepared for their future.A. asB. whichC. whetherD. that有时为避免句子头重脚轻，常用形式主语it代替主语从句作形式主语放于句首，而把主语从句置于句末。主语从句后的谓语动词一般用单数形式。常用句型如下：2.that-从句作主语通常用it作先行词，而将that-从句置于句末。用it作形式主语的that-从句有以下四种不同的搭配关系：a. It + be +形容词+ that-从句It is necessary that有必要It is important that重要的是It is

6、 obvious that很明显b. It + be + -ed分词+ that-从句It is believed that人们相信It is known to all that从所周知It has been decided that已决定c. It + be +名词+ that-从句It is common knowledge that是常识It is a surprise that令人惊奇的是It is a fact that事实是d. It +不及物动词+ that-分句It appears that似乎It happens that碰巧It occurred to me that我突然

7、想起It is quite clear that the whole project is doomed to failure.很清楚，整个计划注定要失败。Its a pity that you should have to leave.你非走不可真是件憾事。另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时，谓语动词要用虚拟语气“(should) +do”，常用的句型有：It is necessary (important, natural, strange, etc.) that It is a pity (a shame, no wonder, etc.) thatIt is

8、 suggested (requested, proposed, desired, etc.) that2.宾语从句.宾语从句与主句的时态要相互呼应 1.如果主句的时态是一般现在时，宾语从句的时态根据具体情况来确定，可以是_时态。Idontthink(that)youareright. Pleasetelluswherewellgofishingtomorrow.DoyouknowwhenMr.Smithmovedhere? 2.如果主句的时态是一般过去时，宾语从句只能用相应的_时态（一般过去时，过去进行时，过去将来时，过去完成时）。例如：HetoldmethathewasborninBeij

9、ingin1992.HesaidthathewouldgobacktotheU.S.soon.特殊情况： 1.从句说明的是一般真理、客观事实、自然现象、名言时，任用现在时。Dadtoldusthatitisbettertodothantosay.Hetoldtheboythatthreeandthreeissix.Couldyoutellmewherethebookshopis. 2.从句中有具体时间状语，即使从句动作发生在主句动作前，仍然用一般过去时。 4 Theteachertoldmeshewasbornin1960.在句中作宾语的从句叫宾语从句。引导宾语从句的关联词与主语从句的关联词大

10、致一样。（1） 由连接词that引导的宾语从句由连接词that引导宾语从句时，that在句中不担任任何成分，在口语或非正式的文体中常被省去。例如：He has told me that he will go to Shanghai tomorrow.他已经告诉我他明天要去上海。We must never think (that) we are good in everything while others are good in nothing.我们决不能认为自己什么都好，别人什么都不好。注意：在demand，order，suggest，decide，insist，desire，request

11、，command等表示要求、命令、建议、决定等意义的动词后，宾语从句常用“（should）+动词原形”。例如：I insist that she (should) do her work alone.我坚持要她自己工作。The commander ordered that troops (should) set off at once.司令员命令部队马上出发。（2）用who，whom, which, whose, what, when, where, why, how, whoever, whatever, whichever等关联词引导的宾语从句相当于特殊疑问句，应注意句子语序要用陈述语序。

12、例如：I want to know what he has told you.我想知道他告诉了你什么。She always thinks of how she can work well.她总是在想怎样能把工作做好。She will give whoever needs help a warm support.凡需要帮助的人，她都会给予热情的支持。【典例1】 (2008北京卷)The companies are working together to create _ they hope will be the best means of transport in the 21st centu

13、ry.A. whichB. thatC. whatD. who【典例2】(2009全国卷) Could I speak tois in charge of International Sales please?A. whoB. whatC. whoeverD. whatever（3）用whether或if引导的宾语从句，其主语和谓语的顺序也不能颠倒，仍保持陈述句语序。此外，whether与if在作“是否”的意思讲时在下列情况下一般只能用whether，不用if：a.引导主语从句并在句首时；b.引导表语从句时；c .引导从句作介词宾语时；d.从句后有“or not”时；e.后接动词不定式时。例如

14、：Whether there is life on the moon is an interesting question.月球上有没有生命是个有趣的问题。The question is whether she should have a low opinion of the test.Everything depends on whether we have enough money.一切要看我们是否有足够的钱。I wonder whether he will come or not.我想知道他来还是不来。Can you tell me whether to go or to stay?你能

15、否告诉我是去还是留？（4）注意宾语从句中的时态呼应，a.当主句动词是现在时，从句根据自身的句子情况，而使用不同时态。例如：I know (that) he studies English every day.（从句用一般现在时）I know (that) he studied English last term.（从句用一般过去时）I know (that) he will study English next year.（从句用一般将来时）I know (that) he has studied English since 1998.（从句用现在完成时）b.当主句动词是过去时态（could,

16、 would除外），从句则要用相应的过去时态，如一般过去时，过去进行时，过去将来时等。例如：The teacher told us that Tom had left us for America.c.当从句表示的是客观真理，科学原理，自然现象，则从句仍用现在时态。例如：Our teacher said that the earth travels around the sun.（5）否定转移a.将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式。I dont

17、 think I know you.我想我并不认识你。I don t believe he will come.我相信他不回来。注意：若谓语动词为hope,宾语从句中的否定词不能转移。I hope you werent ill.我想你没有生病吧。b.将seem, appear等后的从句的否定转移到前面。It doesnt seem that they know where to go.看来他们不知道往哪去。It doesnt appear that well have a sunny day tomorrow.看来我们明天不会碰上好天气。3.表语从句在句中作表语的从句叫表语从句。引导表语从句的

18、关联词与引导主语从句的关联词大致一样，表语从句位于连系动词后，有时用as if引导。其基本结构为：主语+系动词+ that从句。例如：The fact is that we have lost the game.事实是我们已经输了这场比赛。Thats just what I want.这正是我想要的。This is where our problem lies.这就是我们的问题所在。That is why he didnt come to the meeting.那就是他为什么不到会的原因。It looks as if it is going to rain.看上去天要下雨了。需要注意的，当主

19、语是reason时，表语从句要用that引导而不是because。例如：The reason why he was late was that he missed the train by one minute this morning .【点拨】whether可引导表语从句，但与之同义的if却通常不用于引导表语从句。【典例1】(2009 山东卷)The little girl who got lost decided to remain _she was and wait tor her mother.A. whereB. whatC. howD. who【典例2】(2008天津卷)The

20、last time we had great fun was _ we were visiting the Water Park.A. whereB. howC. whenD. why4.同位语从句同位语从句说明其前面的名词的具体内容。同位语从句通常由that引导，可用于同位语从句的名词有advice，demand，doubt，fact，hope，idea，information，message，news，order，problem，promise，question，request，suggestion，truth，wish，word等。例如：The news that we won the

21、game is exciting.我们赢得这场比赛的消息令人激动。I have no idea when he will come back home.我不知道他什么时候回来。The thought came to him that Mary had probably fallen ill.他想到可能玛丽生病了。【典例】(2009重庆卷) We should consider the students request _ the school library provide more books on science.A. thatB. whenC. whichD. where【答案】A【解析

22、】考查名词性从句。根据题意知，空格处是同位语从句的引导词，修饰中心名词request，且在句子中不充当成分，故用that。这句话的意思是我们应该考虑学生的这个要求，即学校图书馆应该多提供一些大众科学方面的书籍。【专题突破】高考中考查名词性从句时，经常考查连接词的选用。解题时应：1、先判断从句的类型2、判断从句是否缺少成分以及意义是否完整3、根据引导名词性从句的连词的特点确定特定的连接词。不可省略的连词：1.介词后的连词2.引导主语从句和同位语从句的连词不可省略。That she was chosen made us very happy.We heard the news that our t

23、eam had won.【专题巩固】1. A warm thought suddenly came to me _I might use the pocket money to buy some flowers for my mothers birthday .A. ifB. whenC. thatD. which2. See the flag on top of the building ? That was _ we did this morning.A whenB. whichC. whereD. what3.The government has announced that a mod

24、ern city will be set up in _is still a wasteland now.A. whatB. whichC. thatD. where4. Many people wrote articles on _Liu Xiang had failed to compete in the event .A. whyB. whatC. whoD. that5. The couple are spending their holiday on _is described as one of the most beautiful islands.A. thatB. whatC.

25、 whichD. where6. The book is meant to _needs it .A. whoB. whoeverC. whomeverD. whom7. In his speech, Premier Wen Jiabao points out that creativity is_it takes to keep a nation highly competitive.A. howB. whatC. whichD. that8. The experience of the Chinese nation attests to a truth_ a nation loses in

26、 times of disaster will be made up for by her progress.A. that whatB. whatC. thatD. what that9. _has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem .A. ThatB. WhatC. In spite of whatD. Though what10._is certain is _prevention is more

27、important than treatment.A. It; thatB. What; thatC. As; whatD. What; what11. Nobody would stand out admitting the fact, for some reason, _they lost the game.A. thatB. whichC. whatD. why12. The patient looks much better. _is it that has made him_he is today?Perhaps the special medicine and his family

28、s patient care.A.What; thatB.That; thatC.What; whatD.What; which13. After three hours climbing , they reached _ they thought was the place theyd been dreaming of .A.whatB.whichC.whereD.that14. A plan has been put forward _more graduates should go to work in the countryA. whenB. thatC. whetherD. how1

29、5. It is pretty well understood _controls the flow of carbon dioxide in and out the atmosphere today.A. thatB. whenC. whatD. how16. (2009湖南卷) She is very dear to us. We have been prepared to do _it takes to save her life.A. whicheverB. howeverC. whateverD. whoever17. (2009陕西卷) The how- to book can b

30、e of help to _wants to do the job.A. whoB. whomeverC. no matter whoD. whoever18. (2009安徽卷) A good friend of mine fromI was born showed up at my home right before I left for Beijing.A. howB. whomC. whenD. which19. (2009江苏卷)Many young people in the West are expected to leave_could be lifes most import

31、ant decisionmarriagealmost entirely up to luck.A. asB. thatC. whichD. what20. (2009浙江卷)Is there any possibility _ you could pick me up at the airport?No problem.A. whenB. thatC. whetherD. what【参考答案及解析】1. C句意：我脑海中突然出现一个温情的念头，用我的零花钱给妈妈买些鲜花作为她的生日礼物。本题考察名词性从句用法。I might use the pocket money to buy some f

32、lowers for my mothers birthday .做A warm thought的同位语从句。中间被suddenly came to me隔开，增加了试题难度。此外，部分考生由于对同位语从句和定语从句不分，故错选D为答案。2. D表语从句中缺did的宾语。3. A “_is still a wasteland now .”做介词in的宾语从句，从句中缺主语句意为：政府已经宣布一座现代化的城市将在这片现在仍是废墟的地方建成。4. A“_Liu Xiang had failed to compete in the event.”做介词on的宾语，宾语从句中不缺主干，故排除B和C。另外

33、that不引导介词的宾语从句（固定搭配除外），所以排除D。5. B “_is described as one of the most beautiful islands .”宾语从句，从句中缺少主语，6. B whoever在宾语从句中做主语，部分学生，因为只看到介词to，误认为要添whomever做介词的宾语。7. B “_it takes to keep a nation highly competitive.”做表语从句，从句中缺少takes的宾语，构成it takes sth to do sth结构。8. A本题句子结构比较复杂，“_ a nation loses in times

34、of disaster will be made up for by her progress”做a truth的同位语从句，同位语从句中_ a nation loses in times of disaster为主语从句。本句共有两个从句，故有两个引导词。句意为“中华民族的经验证明了一个真理，即，一个民族在灾难中失去的，必将从民族的进步中得到补偿。9. C “_has recently been done to provide more buses for the people”在句中做让步状语,而D. Though what错误,因为,一个单一的从句不能用两个连词引导.句意:尽管在为人们提

35、供更多公交车这件事上,投入了很多,但是公交工具的缺乏,仍然是个问题.10.B “_is certain”在句中做主语,主语从句缺少一个主语,需要用What; “_prevention is more important than treatment .”系表语从句,句意与结构完整,只有that,可以这样用。11.A“_ they lost the game.”在句子中做the fact的同位语从句,从句意思结构完整,结构完整。12. C先将句子结构理清楚，it is _that has made him _he is today就可以判断，第一个空是考察强调句型的特殊疑问形式；第二个空则是表语

36、从句，表语从句中缺少he is的表语。句意：病人好多了，是什么使得他成为现在这个样子。13. A考生误以为是地点状语从句，误选C.where。而reached是及物动词，后边接的是宾语从句，宾语从句除去插入语they thought，应该缺主语。14.B考察同位语从句，表达A plan的具体内容，has been put forward将名词与从句隔开，加大了难度。15.C主要测试主语从句。分析句子结构可知：句子属于形式主语格式；另外主句中缺少主语。双重作用的引导词只能是what。例如：It is still doubtful what he said at the meeting yeste

37、rday。昨天他在会上说的话仍然值得怀疑。16.C名词性从句的引导词。句意为：她对我们来说是非常宝贵，我们已经准备好做一切来拯救她的生命。17.D此处从句作介词to的宾语，是名词性从句，引导词作从句的主语，指人，意思是：无论是谁，选D。18.C考查名词性从句，介词from后除了接代词或名词作宾语外，还可接介词短语或副词短语作宾语；由后面“I was born”可以推测from后面可以指时间，也可以指地点，再由所给的选项可得出答案。19.D考查名词性从句。宾语从句中缺少主语，因此选what。20. B考查同位语从句。此处是由what引导的同位语从句，表示“你有没有可能来机场接我？”。所以选B项。7