1. 名词性从句顾名思义，就是一个句子在整个句子中充当一个名词所起的成分作用，这时就变成了名词性从句。按照分类分为主语从句、宾语从句、表语从句和同位语从句。 2. 要点梳理
That I can pay back the help that people give me makes me happy.
She believed that he had not told her the truth.
The truth is that the fog is too thick for the bus to run that far.
She had a feeling that she was being watched.
Whether he will be able to come is not yet known.
I wonder if/ whether that’s a good idea.
There was a discussion about whether Polly had found the blind man.
My question is whether Polly can find her way home.’
There is a question whether he will come here.
What matters/counts most(is the most important) is the way you speak to your parents.’
Polly did not know which dress she should buy.
My question is what we should call this kind of plant.
I have no idea who he is.
Why they have not left yet is not clear so far.
We wonder when they will come here.
The problem is how Polly is going to find us in the crowd.
I have no idea when the bus is coming.一氧化氮合成酶
3. 连词的选择(根据要求在下列空格中填入适当的连词)
a. 在从句中不起任何成分作用，只起连接作用，也没有任何意义____________________
b. 在从句中不起任何成分作用，只起连接作用, 但具备一定的意义_________________
c. 起连接作用且在从句中起相当于代词的成分作用，在从句中充当主语，宾语，表语，定语作用，有一定的意义__________________
d. 起连接作用且在从句中起相当于副词的成分作用中国扬州寄语市长
，在从句中充当状语作用，表示地点，方式，原因，时间等。_____________________________ e. that只能当引导宾语从句时，可以省去.如果引导多个宾语从句，只能省略第一个。
f. if 只能引导宾语从句企业国有资产交易监督管理办法
g. what 与 which 的区别
如指物,在句中充当主语、宾语、表语用what, 它引导的名词性从句有两个意思：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; 如有范围，表“哪一个”用which
h. 同位语从句的引导和辨别
1.同位语从句的格式：n.+ 连接词 + 从句
2.能接同位语从句的名词有：fact、idea, news, information, order, belief, suggestion, advice, opinion, doubt, question, problem, possibility, truth, view, promise, evidence, knowledge, account, impression, consensus, assumption, argument, assessment 等.
3.连接词通常是that,也可根据含义选用 whether, what, when, where 等来引导同位语从句.
(1) I have no idea _________ he comes from.
(2) He can’t answer the question ________ he got the money.
(3) He gave us many suggestions ________ we should get up earlier and take more exer
cise.
(4) I have no doubt ________ he will win.
(5) I have some doubt ________ he will win.
i. 同位语从句与定语从句比较
1定语从句是先行词的修饰语，它不涉及先行词的具体内容。定语从句中that不但起连接作用，而且在定语从句中充当一个句子成分，充当从句的宾语成分时可省略。
2同位语从句对中心词的内容作进一步的解释和说明，表明中心词的具体内容。引导同位语从句的that 在同位语从句中不做任何成分,只起连接作用,无具体含义,且不可省略.
(1) The news that he couldn’t come made us upset.
The news (that/which) he told us∧ was exciting.
(2) I have no idea when we will set off.
I still remember the days when we worked together.
I still remember the days (which/that) we spent ∧together.
(3)We expressed the hope that they had expressed∧.
We expressed the hope that they would come to China again.
(4)The information has been announced that more middle school graduates will be admitted into university.(同位语从句由于较长，根据英语句子结构需要，把长的放在后面)
The information that he revealed ∧at the meeting is of great value.
●There is also something exciting __________ he said about young people.
●Ban Ki-moon stated his opinion ___________he had already made up his mind to build upon the already-made achievements of the UN.
●I have no idea ____________ he will arrive here.
●The day came _____________ he won the match.
j. 引导名词性从句要注意的几个问题:
（1）具有疑问意义的连词所引导的名词性从句中，必须用陈述句的语序。
改错：Why did he come here yesterday was still unknown.
（2）要让从句尤其是宾语从句中的谓语动词与主句中的谓语动词在时态上保持一致。
改错： I thought he is coming here the next afternoon.
（3）在主语从句中，如从句表述的是一般现在时，它所相对应的谓语动词要用第三人称单数。
改错：That he has been made president of the company make us very happy.
（4）it 在名词性从句中可以充当形式宾语或形式主语。
如It makes me happy that I can now pay back the help people give me.
We all think角蜡蚧 it very necessary that we should learn English well.
改错: People feel necessary that traffic regulations and rules must be strictly obeyed 金昌市政府工作报告
by drivers.
(5)名词demand, suggestion, proposal, advice等词后的同位语从句的语气要用虚拟语气,结构为 should + do, should 可省略
He gave me a suggestion that I ( should ) be calm.
（6）并列的宾语从句中的后几个从句的,引导词that 不能省略
.He told me _________ his father had died and _________ he had to make a living alone.
（7）由who, whom, what, which, how, where, when与ever构成的复合连接词表示“不管碱性硅溶胶….”或 “无论….”.
_________ come here first can get a nice gift.
You can turn to _________ is good at computer for help.
注意：what，which，who，whom与whatever，whichever，whoever，whomever 的区别,前者(一)带有疑问概念，（二）引导名词性从句；后者（一）表示强调，（二）既可以引导名词性从句，也可引导让步状语从句，引导让步状语从句时等于no matter+疑问词，同时，让步状语从句和名词性从句可相互转化.
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