名词从句

名词从句

合句和复句

如果是两个各自能够独立的简单句，中间以and、but、or等连接词连起来，没有主、从之分，就称为合句

如果将一个句子改造成名词、形容词或副词类，放到另一句中使用，就称为从属从句，另一句则称为主要从句

特点

本身是一个完整的简单句

前面加上连接词that，表示后面跟着一个名词从句

名词从句须放在主要子句的名词位置（主语、宾语、补语、同位语等位置）

主语位置

Something is strange

He didn't show up on time

That he didn't show up on time is strange

It is strange that he didn't show up on time（名词从句太长可以用it这个虚词来填入主语位置）

宾语位置

The defendant said something

He didn't do it

The defendant said that he didn't do it

That 是从属连接词，能否省略，要看省略后能否维持意思的清除

补语位置

The car is ruined.The important this is that we're all right.

the important thing = we're all right（名词类的主语补语与主语之间是同等关系）

可以省略that。The import this is we're all right

同位语位置

The Story that he once killed a man might just be true.

I am afraid that I can't help you.(分解)

I am afraid of that thing（that thing没有意义）

I can't help you

You'd better take care that nothing goes wrong

You'd better take care of that thing

Nothing goes wrong

名词从句的放大

名词从句的内容，有时比主要从句重要，这时候可以选择把名词从句当成主要从句处理，把主要从句缩小，放入逗号后

I suppose that this is your last offer

疑问句改装的名词从句

I know the question

who are you?

I know who you are

The question is anybody's guess

When will the bomb go off?

When the bomb will go off is anybody's guess

whether和if

I can't tell which

Either he's telling the truth or not

I can't tell if he's telling the trurh or not

whetrher和解释为“是否”的if在大多数情况下可以互换，但是在句首位置及介系词后面就只能用wehther

总结

名词从句有两种形态

完整的简单句外加无意义的连接词that，代表“那件事”

疑问句引导的疑问句改装，不加连接词，代表“那个问题”，其中wehther有时可改写为if