一．主语从句
主语从句是在复合句中充当主语的从句，通常放 在主句谓语动词之前或由形式主语it代替，而本身放 在句子末尾。
1. It 作形式主语
It 作形式主语代替主语从句，主要是为了平衡句子结构，主 语从句的连接词没有变化。例如：
It is a pity that you didn’t go to see the film. It doesn’t interest me whether you succeed or not.
名词性从句
Unit 1 The world of our sense
Grammar
Noun clause
名词ቤተ መጻሕፍቲ ባይዱ从句
名词从句又可分别称为主语从句、宾语从句、表语从句和 同位语从句。
引导名词性从句的连接词可分为三类： 连接词：that, whether, if 连接代词：what, whatever, who, whoever, whom, whose, which. 连接副词：when, where, how, why
I heard that he joined the army. (2) 由what, whether (if) 引导的宾语从句，例如：
She did not know what had happened. I wonder whether you can change this note for me. (3) 动词＋间接宾语＋宾语从句。例如： She told me that she would accept my invitation. 2. 作介词的宾语，例如： Our success depends upon how well we can cooperate(合作） with one another.
That we need time is obvious.
It is obvious that we need time.
2. What 引导的主从，what作主语，宾 语或表语，表。。。的东西
What we need is time. What he said it is true.
What 引导的主从，谓语动词视后面的名 词而定。 What we need is time.
2) T_h_a_t___she is still alive is a good thing.
It is a good thing that she is still alive.
3. 由whether引导的主从: e.g. Whether he’ll be able to come is not yet
4. 疑问词引导的主语从句 what; which; who; whom; when; where; why; how 原则:缺什么补什么 What he said at the meeting surprised us. Who will win the game is not clear. Where he will go is unknown. Why they have not left yet puzzled me. How we can get there is a problem.
Ex.
1.___A___ makes this shop different is that it offers more personal services.
A.What
B. Who
C. Whatever
D.
Whoever
2.__C____I can pay back the help that people give me makes me very happy.
3. 作形容词的宾语，例如： I am afraid (that) I’ve made a mistake. I am sure (that) he will win the game.
4. it 可以作为形式宾语 it 不仅可以作为形式主语，还可以作为形式宾语而真正
A.Where
B.What
C.That
D.How
3.It’s not clear _A_______ was responsible for the accident.
A.Who
B.What
C.How
D.That
二．宾语从句
宾语从句就是在复合句中作宾语的名词性从句，通常放 在主句谓语动词 (及物动词) 或介词之后。 1. 作动词的宾语 (1) 由that引导的宾语从句(that 通常可以省略), 例如：
Ⅰ Subject clause 引导主语从句的连词主要有:
that whether 疑问词
一.由 that 引导的主从: 1. That we shall be late is certain. 2. _T_h__a_t _th_e__e_a_r_th__is__r_o_u_n_d_ is known to all.
What he gave me are two books.
2. what 与that 在引导主语从句时的区别
what 引导主语从句时在句时在从句中充当 句子成分，如主语．宾语．表语，而that 则 不然。例如：
1)W__h_at___you said yesterday is right.
It is right what you said yesterday.
(地球是圆的) 3. _T_h__a_t _y_o_u_m__i_ss_e_d__th_e__c_h_a_n_c_e is a pity.
(你错过了这次机会)
★ that 不作成分，无意义, 但不能省略. 后接一个完整的陈述句.
注：that 引导的主语从句作主语，谓语 用单数。
That 引导的主从，常用形式主语it 代替， that 从句后移。
known. Whether we will succeed is still a question.
★主语从句不能用if来引导; 陈述语序
Ex:1.是否我们要参加这次会议仍未被决定。 Whether we shall attend the meeting hasn’t been decided yet.