表语从句用法

表语从句

在复合句中作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样,表语从句位于连系动词后,一般结构是“主语+连系动词+表语从句”。可以接表语从句的连系动词有:be, look, remain, seem等。注意:关联词不能省略,并且从句用陈述语序。例如:

The fact is that we have lost the game. That is why he didn’t come to the meeting.

需要注意的,当主语是reason时,表语从句要用that引导而不是because。但是reason 后面的定语从句可以用why 或that引导。例如:The reason why he was late was that he missed the train by one minute this morning

【附加】在名词性从句中that与what的区别:

that在名词性从句中不充当句子成分,只起连接作用,没有意义,不能省略(在宾语从句中能省略)。

如:That they are good at English is known to us all.

The problem is that we don’t have enough money.

what在名词性从句中充当句子成分,起连接作用,有意义,不能省略。what可以分解成定语从句中的先行词 + 关系代词+ that。理解为双重身份。

如:Do what he says.        What (=The thing that) he said was true.

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