名词性从句的用法

名词性从句是英语中常用的从句，分为主语从句、宾语从句、表语从句和同位语从句，各种从句的用法如下：

1. Subject Clause 主语从句

 引导词：that, if/whether

That he’ll come tomorrow is known to us all.

Whether the work can be finished on time is doubtful.

wh—类的连接代词：what, who, whom, whose, whoever, whomever, whoseever, whatever；

Whoever will be in charge of the project hasn’t been decided yet.

wh—类的连接副词：when, where, how, why, whenever, wherever, however;

When he came yesterday is still a secret.

   It is + (名词、形容词、过去分词）+主语从句

n  It is wildly acknowledged that education plays a rather important role in our sociey.

n  It is reported that the proportion of children who choose to watch sports decreased sharply in the past years.

常用句式：It is estimated/expected/wildly acknowledged /obvious/noted/reported that +从句

2. Object Clause 宾语从句

  在句子中起宾语作用的句子，分为三类：动词的宾语；介词的宾语；形容词的宾语。

-- Some people think that it is better for children to learn a foreign language at primary school.

引导词：that, whether, if, what, which, whose, when, where, how, why, who, as

n  I didn’t expect that he had broken the glass.

n  Can you tell me how many students there are in your class?

3. Predictive Clause 表语从句

  在句子中起表语作用的句子。

-- The reason is that students are too young to understand what is right or wrong.

常用句式：The reason is/The fact/truth/fact is / My view is / The first thing i want to mention is +that从句

引导词：that, whether, if, what, which, whose, when, where, how, why, as if/as though

n  My view is that students should be encouraged to widen their horrizons.

n  They are just what the real society wants.

4. Apposition Clause 同位语从句

同位语从句对一些抽象名词做进一步的解释和说明。  

-- The possibility that most people will work at home is often discussed.

常用的抽象名词： idea, fact, news, hope, belief, suggestion, proposal, wish, thought, doubt, truth, possibility, promise, order, explanation

引导词：that, whether, if, who, what, which, when, where, how, why,

n  I have no idea when she will be back.

n  The question who should go abroad requires consideration.