2022年初中主语从句讲解 .pdf

主语从句名词性从句包括：主语从句、表语从句、宾语从句和同位语从句。引导名词性从句的连词有：A.连词：that, whether, if（这三个词都不作从句的成分，同时，that无含义，而 whether 和 if 都表“ 是否” ）B.疑问代词： who, whom, whose, what, which C.疑问副词： when, where, why, how （一）主语从句：在复合句中充当主语的从句。1.that 引导主语从句that引导主语从句时不同于其他的连词，既无词义也不作成分，只起单纯的连接作用， 且通常不可以省。 为了强调 that引导的主语从句而置之于句首时， that不可省。That the driver could not control his car was obvious. 很明显司机不能控制住他的车了That she was chosen made us very happy. 她被选上让我们很高兴That he will come is certain. 他要来已经千真万确了通常， that引导主语从句时用it 做形式主语，把从句置于句尾，此时 that 有时可省。例如：It was obvious that the driver could not control his car. 很明显司机不能控制住他It made us very happy that she was chosen. 她被选上让我们很高兴精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 1 页，共 8 页It is certain that he will come. 他要来已经千真万确了如果以 that 从句为主语的句子是疑问句，就只能用先行词it 结构。例如：Is it certain that he will come? Is it true that he would take the risk? it 做形式主语有以下几种不同的结构：(1)It + be + 形容词 + that-从句It is likely that he will come. 他可能会来It is strange that she has ever trusted him. 她相信他，真令人奇怪(2)It + be +名词+ that-从句It is common knowledge that the whale is not a fish. 鲸鱼并不是鱼， 这是常识Its a pity that he should have catched the train. (3) It + be + -ed 分词 + that 从句It is said that he is a famous writer. 据说他是个著名作家It is reported that there will be a storm this afternoon. 据报道下午将有一场暴风在表示建议、要求、命令等意义的被动结构中，that 从句中的谓语动词常用 (should) do。（参见虚拟语气部分）It is suggested that the meeting (should) be held this afternoon. 会议被精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 2 页，共 8 页建议在下午举行It is demanded that he (should) leave at once. 他被要求立即离开(4) It + seem/happen/appear 等不及物动词+ that 从句。It seems that he is wrong. 看起来似乎他错了It appears that they are in need of help. 看起来他们需要帮助2. whether 引导主语从句，意为 “ 是否” ，只起连接作用，不充当任何成分。 （置于句首时必须用whether 引导，置于句尾时，间或可用 if。 ）Whether he will win the game is not clear. 他是否会赢得比赛还不清楚。Whether he will come is uncertain. 他是否会来还不确定It is not clear whether/if he will come. It was uncertain whether he would come. 3. 连词代词 what, who, which, whose 等引导的主语从句。这些连接代词作用相当于代词，在从句中担当主语、宾语、表语、定语等。What we need is more time. 我们需要的是更多时间Who was responsible for the accident is not yet clear. 谁应该对这场事故负责还不清楚。Whose book it is not important. 这是谁的书并不重要。Which school you want to go matters much. 你想去哪所学校很重要4.连接副词 when, where, why, how 引导的主语从句。这些连接副词相当于副词，在从句中充当状语。精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 3 页，共 8 页Why he did this is not known. 他为什么做这件事还不知道。When he will come is still unknown. 他什么时候来还不知道。It is not known why he did this. 他为什么做这件事还不知道注意： wh-引导的主语从句也常用it 作形式主语。5.也可用 whatever,whoever,whomever,whenever,wherever等词引导主语从句，表示 “ 无论什么 ” 、“ 无论谁 ” 、“ 无论何时 ” 、“ 无论在（到）哪里” 等。Whatever he gave you should be handed in. 他无论给你什么都要上交Whoever told you that was lying. 无论谁告诉你，那都是撒谎Whoever comes is welcome. 无论谁来都是欢迎的参考答案 1-10 CBACD DDCAA 11-20 CBDAC BDBAC 21-30 BABBCBAA精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 4 页，共 8 页主语从句专项练习1._ makes mistakes must correct them. A. What B. That C. Whoever D. Whatever 2. It worried her a bit _ her hair was turning grey. A. while B. that C. if D. for 3.When and why he came here _ yet. A. is not known B. are not known C. has not known D. have not known 4. _ is no reason for dismissing her. A. Because she was a few minutes late B. Owing to a few minutes late C. The fact that she was a few minutes late D. Being a few minutes late 5. _ Tom liked to eat was different from _. A. Thatthat you had expected B. What that you had expectedC. Thatwhat you had expected D. What what you had expected6._ we go swimming every day _ us a lot of good. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 5 页，共 8 页A. If.do B. That.do C. If.does D. That.does 7.It _ Bob drives badly. A. thinks that B. is thought what C. thought that D. is thought that 8.Its uncertain _ the experiment is worth doing. A. if B. that C. whether D. how 9._ the boy didnt take medicine made his mother angry. A. That B. What C. How D. Which 10._ we cant get seems better than _ we have. A. What, what B. What, that C. That, that D. That, what 11._ you dont like him is none of my business. A. What B. Who C. That D. Whether 12._ well go camping tomorrow depends on the weather. A. If B. Whether C. That D. Where 13._is going to do the job will be decided by the Party committee. A. That B. Why C. How D. Who 14._well finish translating the book depends on the time. A. When B. Why C. What D. That 15._he wont go there is clear to all of us. A. How B. What C. Why D. This 16._the house will be built will be discussed at tomorrows 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 6 页，共 8 页meeting. A. If B. Where C. That D. What 17. ._you come or not is up to you. A. What B. If C. Why D. Whether 18.Is _true that the famous scientist will give us a lecture next week. A. that B. it C. is D. he 19._team will win the match is a matter of public concern. A. Which B. That C. If D. How 20._leaves the room last ought to turn off the lights. A. Anyone B. The person C. Whoever D. Who 21. _he really means is_ he disagrees with us. A. What, what B. What, that C. That, that D. That, what 22.It has not been decided _they will leave for Beijing. A. when B. that C. what D. why 23._he will go to work in a mountain village surprises all of us. A. What B. That C. Whether D. If 24. _you dont like him is none of my business. A. What B. That C. Who D. How 25._all the inventions have in common is _they have succeeded. A. What; what B. That; that C. what; that D. That ; what 26. _appeared to me that he enjoyed the food very much. 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 7 页，共 8 页A. What B. It C. All that D. That 27. It is widely _that smoking can cause cancer. A. believed B. think C. say D. hoped 28. _caused the accident is still a complete mystery. A. What B. That C. How D. Where 29_he does has nothing to do with me. A. whatever B. No matter what C. That D. If 30. It was he said disappointed me. A.what ;that B.that; that C.what;what D.that;what 精选学习资料 - - - - - - - - - 名师归纳总结 - - - - - - -第 8 页，共 8 页