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高三英语语法复习之名词性从句

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                            名词性从句

   名词性从句包括主语从句、宾语从句、表语从句和同位语从句。每一种从句的引导词都位

于从句句首,且从句用陈述语序。

I.主语从句

 1. 放在主句谓语动词前,构成:主语从句+谓语动词+其他

 2. 引导词    

    that  (不作成分,不可省)

    whether (是否,常与    or not 连用)

    what, whatever, who, whoever, which, whichever (在从句中作主,宾,表)

    when, where, why, how. (在从句中作状语)

3. 语序:陈述语序

   ______we need is more practice. 

   ______he didn’t come wasn’t clear.    _______he will come isn’t clear. 

   ______we are invited to the concert this evening is good news to us. 

   Ex. 

   1. ________we dislike to talk about is politics. 

   2. _________ he passed the driving test made us very happy.

   3. _________ he will go abroad hasn’t been decided yet. 

   4. _________ has helped to save the drowning boy is worth praising. 

   5. _________ began as a small activity has taken the shape of an inspiring 

    institution of international standards.

4. 有形式主语的主语从句            It is +adj./n./done+that…

   ★It is possible/likely/necessary/important/clear/obvious/surprising… that …      

   ★It is a pity/shame that     It’s no wonder that
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   ★It is known/said/reported/believed/suggested that      

   ★It is uncertain/unsure/not obvious/not clear/a puzzle + wh-…

   1. It’s important ______you have a good time at the prom.

   2. It is not clear _______he will come here tomorrow.  

   3. _____________________(真遗憾) she has made such a foolish mistake. 

   4. It remains to be seen _______we will play in the final. 

   5. It’s recently reported _________ spoons can be made from grains. 

   6. (改错)It is known to us all some students copy others’ homework. 


II. 表语从句

  1. 跟在系动词后,构成:主语+系动词+表语从句

  2. 引导词、语序(同主语从句)

    1) That’s exactly_______the Englishtown teacher David and 22 volunteer 

     students did. 

    2) The problem is _______we can find him or not. 

    3) The reason why he was absent was _______he was ill. 

    4) He was ill. That was ________he was absent. 

    5) He was absent. That was __________he was ill. 

    6) It seems _______he has known the truth. 

 3.  It looks/seems as if/as though 从句

     It looks as if it’s going to rain. 

   

III. 同位语从句 

 1. that 引导同位语从句
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 一般跟在某些表示抽象名词后如:fact, news, word, idea, possibility, information, 

 hope, thought, belief, evidence ,notice, promise 等。对前面的名词起补充说明的

 作用,that   在从句中不充当任何成分,但不能省略。

①  Modern  science has given clear evidence________ smoking can lead to many  

   diseases.

② Is there any possibility _______ you could pick me up at the airport?

③ When the news came______ the war broke out, he decided to serve in the army.

④  The fact has worried many scientists _____the earth is becoming warmer and 

   warmer these years.

2. 其他关系词引导同位语从句

⑤ I’ve no idea ___________the meeting will be held. 


IV. 宾语从句:

 1. 主语+及物动词+宾语从句

 2. 主语+不及物动词+介词+宾语从句

 3. 引导词、语序(同主语从句)

   No one knew _________ he made such a mistake. 

   I’m proud of _________they have done. 

   Scientists disagree on _________the universe was created. 

   It depends on __________you can do the work well. 

4. 注意:

  1)紧跟在动词后由        that 引导的从句     that 可省;

    而  find, think, feel, consider, make+ it+ adj./n. + that 从句,that 不能省略。

    I hope that the party will be a great success.
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   =I hope the party will be a great success.

    I feel it a pity ________ she can’t come.

    We consider it necessary ________ we should improve our listening.

    I think it possible _________ he will win the match.

    I want to make it clear_________I’m against the plan.

 2) 宾语从句的时态通常与主句保持相应一致。

    He said that he _________________(see) the film before.

    Please tell me if he _________(need) the dictionary.

  3) 如果宾语从句是由        that 引导的两个或两个以上的并列从句,第一个                  that 可省

    略,后面的     that 不能省略。

    He said (that) he had seen the film the day before and ______he would see 

    another the next week.

 4)   有些动词不能直接跟宾语从句,需要借助形式宾语                      it,常见的有   like, dislike, 

    hate, love, enjoy, appreciate 等。

    I would appreciate it ______you could stay for lunch. 

    I hate it _________people speak with their mouths full. 

V. whether ,  if  (是否) 的用法   区别

  1. 引导表语从句和同位语从句常用              whether.

     The question is _________________ the meeting will be held.

     I have no idea ____________________ the meeting will be held.

  2. 当主语从句放于句首时常用             whether; 但当   it 作形式主语,主语从句放在句

     尾时,用    whether 或  if 均可

    ________________ the meeting will be held is still a question.

    It is uncertain ____________________ he will come here.
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  3.  宾语从句用      whether 或 if   均可。但作介词宾语时只用            whether.   动词

     discuss 后只用  whether.

     It depends on _____________ you can finish the work on time.

    Recently we’ve discussed __________students should carry mobilephones at 

    school.

  4. whether or not 连在一起,不用     if 替代

    e.g. It remains to be seen __________ or not this idea can be put into practice.

    It remains to be seen ___________ this idea can be put into practice or not.

    I wonder ____________I should wear a coat or not.


巩固练习    1

1. _________ we are invited to the concert this evening is good news to us.

2. The most pleasant thing of the rainy season is _______one can be entirely free 

  from dust. 

3. __________ we can go camping this weekend depends on the weather.

4. Time will tell ___________ you are right.

5. My decision is ____________ I will give up smoking within half a year.

6. The problem is ____________ we can finish the task ahead of time.

7. It looks ____________ it is going to rain again.

8. I am afraid he’s more of a talker than a doer, which is ______ he never finishes 

  anything.

9. _________ surprises us is __________ she can play several instruments.

10. The message you intend to convey may be the opposite of _____ others actually

   understand.
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巩固练习    2

11. There is no doubt _________ such a hardworking man will be rewarded.

12. You should stick to ___________ you set out to do.

13. There are so many cell phones available. I have no idea ______ I should choose.

14. The reason he gave for being late was _______ he forgot to use the alarm clock.

15. __________the delayed flight will take off depends on the weather.

16. I made a promise to myself _________ I would make greater progress this year.

17. __________ Barbara Jones offers to her fans is honesty and happiness.

18. He pointed to the hospital and said ,”That’s _______ I was born.”

19. There is a feeling in me __________ we’ll never know _________ a UFO is.

20. Tom looks upset. That is __________ he has only got a “C” in his exam.


巩固练习    3

21. We’ve offered her the job, but I don’t know______ she’ll accept it.

22. It is still a puzzle _____he has been in the last two weeks. 

23. Your support is important to our work. ___________ you can do helps. 

24. _________ you have done really lets me down.

25. The manager put forward a suggestion _________we should have an assistant. 

26. ___________we understand things has a lot to do with what we feel. 

27. My uncle is the owner of a restaurant close to _________I live. 

28. We must find out__________Karl is coming, so we can book a room for him. 

29. I didn’t know ________he was at home instead of mom. 

30. Pick yourself up. Courage is doing______you’re afraid to do. 
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