1、知识要点：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, whichC.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
2、可省。That the driver could not control his car was obvious.That she was chosen made us very happy.That he will come is certain.That he would take the risk is true.That he should have married her isnt surprising.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
3、 control his car.It made us very happy that she was chosen.It is certain that he will come.It is true that he would take the risk.It isnt surprising (that) he should have married her.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
4、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.It is strange that she has ever trusted him.It is important that he (should) attend the meeting.It is best that he (should) go.此句型在表示惊讶、喜悦、遗憾等感情色彩时，that 从句中的 谓语动词也常用 (should) + v 原形。It is strange that no one should have objected t
5、o the plan.(2)It + be +名词+ that-从句It is common knowledge that the whale is not a fish.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.It is reported that there will be a storm this afternoon.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(sho
6、uld) do。（参 见虚拟语气部分）It is suggested that the meeting (should) be held this afternoon.It is demanded that he (should) leave at once.(4) It + seem/happen/appear 等不及物动词 + that 从句。（look 不接 that 从句，它接 to be 结构或形容 词）It seems that he is wrong.It appears that they are in urgent need of help.He looks (to be)
7、surprised/happy/sad.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.Whether he will come is uncertain.Whether she comes or not doesnt concern me.It is not clear whether/if he will come.It was uncertain whether he would come.3. 连词代
8、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.Who was responsible for the accident is not yet clear.Whose book it is not important.Which school you want to go matters much.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。Why he did this is no
9、t known.When he will come is still unknown.It is not known why he did this.How he succeeded is unknown to us.Where we should hold the meeting needs to be discussed.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。Whoever told you
10、 to give up smoking was quite right.Whatever he gave you should be handed in.Whoever told you that was lying.Whoever comes is welcome.专项训练：1._ makes mistakes must correct them.A. What B. That C. Whoever D. Whatever2. It worried her a bit _ her hair was turning grey.A. while B. that C. if D. for3.Whe
11、n and why he came here _ yet.A. is not known B. are not known C. has not known D. have not known4._ 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 late5._Tom liked to eat was diffe
12、rent from _.A. Thatthat you had expected B. What that you had expectedC. Thatwhat you had expected D. Whatwhat you had expected6._ we go swimming every day _ us a lot of good.A. If.do B. That.do C. If.does D. That.does7.It _ Bob drives badly.A. thinks that B. is thought what C. thought that D. is th
13、ought that8.Its uncertain _ the experiment is worth doing.A. if B. that C. whether D. how9._ the boy didnt take medicine made his mother angry.A. That B. What C. How D. Which10._ we cant get seems better than _ we have.A.What, what B. What, that C. That, that D. That, what(后设答案，大家不要偷看( o)哦，(*_*) 嘻嘻)
14、KEYS1.C 2.B 3.A 4.C 5.D 6.D 7.D 8.C 9.A 10.A（二）表语从句：在复合句中充当表语。1. that 在引导表语从句时无含 义，不作成分，通常不省。1)表示事 实、真理等的 实际内容。The fact is that he is lying.The odds are that he will not do it.2）表示某人的意见、信念等的实际内容。Our belief is that things will improve.The trouble is that we are short of money.2. whether 引导表语从句（不可用 if
15、)。His first question was whether Holmes had arrived yet.The question is whether people will buy it.3. 连接代词 who, whom, whose, what, which 引导的表语从句。This is what I want.The question is who can be chosen to be manager of the company.My question is which of them is better.4. 连接副词 when, where, why, how 引导的
16、表语从句。The problem seemed how we could make him understand it.The question is where we should go.5. as if, as though 引导的表语从句（常用虚拟语气）。He looks as if he were angry.It looks as if its going to rain.专项训练：1. The question is _ we will have our sports meet next week.A. that B. if C. when D. whether2The reaso
17、n why he failed is _ he was too careless.A. because B. that C. for D. because of3. Go and get your coat. Its _ you left it.A. where B. there C. there where D. where there4The problem is _ to take the place of TedA. who can we get B. what we can get C. who we can get D. that we can get5. What I want
18、to know is _ he likes the gift given by us.A. that B. if C. whether D.不填6. The reason is _I missed the bus.A. that B. when C. why D. what7. That is _ we were late last time.A. that B. when C. why D. what8. She looked _ she were ten years younger.A. that B. like C. as D. as though9.- I fell sick!- I
19、think it is _ you are doing too much.A. why B. when C. what D. because10. The reason why he hasnt come is _.A. because his mother is ill B. because of his mothers being illC. that his mother is ill D. for his mother is ill11.- He was born here.- That is _ he likes the place so much.A. that B. what C. why D. how12.That is _ Lu Xun once lived.A. what B. where C. that D. why(后设答案，大家不要偷看( o)哦，(*_*) 嘻嘻)KEYS1.D 2.B 3.A 4.C 5.C 6.A 7.C 8.D 9.D 10.C 11.C 12.B
