名词性从句讲解及专项练习习题及其解答Word文档下载推荐.docx

1、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：（1）It + be + 名词 + that从句 （2）It + be + 形容词 + that从句（3）It + be + 动词的过去分词 + that从句 （4）It + 不及物动词 + that 从句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 i

2、s a pity （a shame, no wonder, etc.） that It is suggested （requested, proposed, desired, etc.） that2. 宾语从句名词句用作宾语的从句叫宾语从句。引导宾语从句的关联词与引导主语从句表语从句的关联词大致一样，在句中可以作谓语动词或介词及非谓语动词的宾语。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，但如从句是并列句时,第二个分句前的that不可省。He has told me that he will go to Sh

3、anghai 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, demand, request, 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”。I insist that she （should） do her work alon

4、e. 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。 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

5、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。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。 Whether there is life on the moon is an interesting q

6、uestion. 月球上有没有生命是个有趣的问题。 Everything depends on whether we have enough money. 一切要看我们是否有足够的钱。4. 注意宾语从句中的时态呼应，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。 he studies English every day. （从句用一般现在时）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）he has studied English s

7、ince 1998. （从句用现在完成时）当主句动词是过去时态（could, 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；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。The teacher told us that Tom had left us for America 5. think, believe, imagine, suppose等等动词引起的否定性宾语从句中，要把上述主句中的动词变为否定式。即将从句中的否定形式移到主句中。 We dont think you are here. 我们认为你不在这。I dont believ

8、e he will do so. 我相信他不会这样做。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。The fact is that we have lost the game. 事实是我们已经输了这场比赛。 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，当主语是reason时，表语从

9、句要用that引导而不是because。The reason why he was late was that he missed the train by one minute this morning 4. 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。The news that we

10、 won the 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。同位语从句和定语从句的区别：that作为关系代词，可以引导定语从句，充当句子成分，在从句中作宾语时可以省略； that引导同位语从句时，起连词的作用，没有实际意义，不充当句子成分，一般不能省略。试比较下面两个例句:I had no idea that you w

11、ere here（that引导同位语从句，不能省略）Have you got the idea（that）this book gives you of life in ancient Greece？（that引导定语从句，作宾语，可以省略）（二）名词性从句的一般引导词1.连接词that 引导名词性从句时，只起连接作用，没有任何意思，也不充当句子成分，在宾语从句中可省略，但引导其他名词性从句时通常不省略。如：I hope （that） you enjoy your holiday.希望你假期过得好。That he likes you is very obvious.很显然他喜欢你。2.wheth

12、er 引导名词性从句也不充当句子成分，但有自己的意思，表示“是否”；引导宾语从句时，可换成if，但引导其他名词性从句时不能换成if。He asked whether if I would show him the way.他问我是否可以给他带路。Whether it will do us harm remains to be seen.是否对我们有害还要看一看。（引导主语从句，不能用if代替whether）3.连接代词who（m）, whose, which, what等引导名词性从句时，均有各自的意义，在从句中作主语、宾语、定语等。Thats why she wanted to leave.

13、这就是她想离开的原因。When we arrive doesnt matter.什么时候到没有关系。Tell me which one you like best.告诉我你最喜欢哪一个。4.连接副词when, where, why, how等引导名词性从句，也各自有自己的意义，在从句中作状语。The question is how we should carry out the plan.问题是怎样执行这个计划。When shell be back depends much on the weather.她什么时候回来在很大程度上要看天气。Why he did it will remain a

14、 puzzle forever.他为什么这样做将永远是一个谜。（三）名词性从句的重要引导词what用于引导名词性从句是一个十分重要的引导词，它可引导主语从句、宾语从句和表语从句，但不用于引导同位语从句。它引导的名词性从句有两个意思是：一是表示“什么”，带有疑问意味；二是表示“所的”，相当于一个先行词后接一个关系代词。I dont know what you want.我不知道你想要什么。I dont know what you want is this.我不知道你所想要的是这个。引导名词性从句时可用作限定词，其后修饰名词。I gave him what books I had.我把我所有的书都

15、给他了。He gave me what money he had about him.他把身边带有的钱全给了我。注：后的名词可以是复数名词或不可数名词，但通常不能是单数可数名词，并且后接不可数名词时，有时可有little修饰，两者的区别是：what+不可数名词=所有的都，what little+不可数名词=虽少但全部。What friends she has are out of the country.她有的那些朋友全在国外。We gave him what （little） help we could.我们给了他我们力所能及的帮助。whoever, whatever, whichever等

16、也可引导名词性从句，其意分别为“所的一切事或东西”、“任何的人”、“的任可人或物”等。Whoever wants the book may have it.任何人要这书都可拿去。Ill do whatever I can to help him.我们将尽我们所能来挽救他。Buy whichever is cheapest.买最便宜的。注意以下受汉语意思影响而弄错的句子：任何人来都欢迎。误：Who comes will be welcome. / Anyone comes will be welcome.正：Whoever comes will be welcome. / Anyone who

17、comes will be welcome.另外，它们也可引导让步状语从句，其意为“无论”、“不管”，其意相当于no matter who what, which。Whatever happens, you must be calm.不管发生什么情况，你都必须镇静。（whatever = no matter what）He wont eat you, whoever he is.不管他是谁，他也不能把你吃掉。（whoever = no matter who）whoever 引导名词性从句时既用作主格也用作宾语；作宾语时不宜用whomever，因为在现代英语中whomever这个已几乎废弃不用。

18、why与because的用法区别。两者均可引导表语从句，但前者强调结果，后者强调的原因。I had a cold. Thats why I didnt come.我感冒了，因此我没来。I didnt come. Thats because I had a cold.我没有来，那是因为我感冒了。四）名词性从句的语序名词性从句的词序与陈述句语序相同，尤其注意那些由连接代词who（m）, whose, which, what和连接副词when, where, why等引导的名词性从句，不要受它们在特殊疑问句中用法的影响而误用疑问句词序。Why was he crying?她为什么在哭？I dont

19、know why he was crying.我不知道她为什么哭。（五）名词性从句的时态问题当主句的谓语动词是过去式时，宾语从句若不是一个客观事实或真理，其谓语动词也必须用某种过去时态。She said that she didnt want to know.她说她不想知道。I asked her whether she would agree.我问她是否会同意。when, if这两个词既可引导名词性从句，也可引导状语从句。当它们引导名词性从句且表示将来意义时，要直接使用将来时态；但当它们引导状语从句且表示将来意义时，则必须用一般现在时表示将来意义。I dont know when he wi

20、ll come, but when he comes, Ill call you.我不知道他什么时候，但当他来的时候，我会打电话给你。句中第一个when引导的是宾语从句，故用将来时态表示将来意义；第二个when引导的是时间状语从句，故用一般现在时表示将来意义。三解题方法灵活用从句的解题方法或步骤：第一步：先分析出大的类别 定从？/名从？/状从？即分析所缺部分在主句中的成分从而确定从句大的类别第二步：口诀逐一解决：（I）名词性从句。口诀先成分后含义（II）定语从句。口诀先成分后先行词（III）状语从句。口诀翻译即可在本专题中，名词性从句的口诀执行方法是：分析引导词在从句中的成分A 做名词性成分w

21、hat/which/who/as（+wh-ever型）B 做非名词性成分a 不做成分：that/if/whether（whether霸王原则）b 做状语成分：when/where/why/how一旦分出AB两类，剩余的靠含义直接翻译即可解决。例如A computer can only do _ you have instructed it to do. （01年31题）A. how B. after C. what D. when解：先分析出大的类别A computer can only do中的do是及物动词，后面缺少do的对象，所以考察名词性从句问题第二步：从句you have instr

22、ucted it to do中的do是及物动词，后面缺少do的对象，所以前面的空在后面的从句内充当名词性成分，所以可以选择的引导词就可以排除AD（因为这两个引导词在从句中是充当状语的），而选项B是名词性从句中不存在的引导词，所以B也不对，最后就剩下一个正确选项C如此这样一步一步下来，逐一进行排除和选择，最终总是可以直接定位到正确的答案。而这个过程应该是完全被熟化在脑中的一个过程，按部就班的操作直至正确答案自然而然的浮出水面。其他类别的题目也应该仿照此类，依次完成。名词性从句专项练习100题1. His success was because of _ he had been working h

23、ard.A. that B. the fact which C. the fact that D. the fact2. “Is Mary from New York City” “I dont know _.”A. from what city does she come from B. from what city she comeC. what city does she come from D. what city she comes from3. _ makes mistakes must correct them.A. What B. That C. Whoever D. What

24、ever4. The reason why I didnt go to Shanghai was _ a new job.A. because I got B. because of getting C. I got D. that I got5. It worried her a bit _ her hair was turning grey.A. while B. that C. if D. for 6. Henry killed the dog. Ill ask him why _.A. did he do that B. he did that C. he did D. he has

25、done so 7. Have you seen Henry lately My boss wants to know _.A. how he is getting along B. how is he getting alongC. what he is getting along D. what is he getting along8. It is generally considered unwise to give a child _ he or she wants.A. however B. whatever C. whichever D. whenever9. He asked

26、me _ with me.A. what is the trouble B. what wrong wasC. what was the matter D. what trouble it is10. I am sure _ he said is true.A. that B. about that C. of that D. that what11. When and why he came here _ yet.A. is not known B. are not known C. has not known D. have not bee12. I wonder how much _.A

27、. does the watch cost B. did the watch costC. the watch costed D. the watch costs13. Mary is _ someone might recognize her.A. afraid of B. afraid about C. afraid that D. afraid for14._ is no reason for dismissing her.A. Because she was a few minutes late B. Owing to a few minutes lateC. The fact that she was a few minutes late D. Being a few minutes late15. They came to the conclusion _ by a computer.A. that not all things can be done B. be