为什么This is the reason （that） he is late为什么（）可以用that 或不填什么是同位语从句

来源：学生作业学帮网编辑：学帮网时间：2024/06/06 04:51:59

为什么This is the reason （that） he is late
为什么（）可以用that 或不填
什么是同位语从句

这不是同位语从句,是定语从句.这里也可以用关系副词why.
同位语从句是用来解释先行词的内容的,定语从句是用来修饰先行词的.试举例：
It is a fact that she has done her best.
It is a fact that you can't deny.
前一句是同位语从句,fact事实的内容是她已经尽了最大努力了.
第二句是定语从句,这是一个你不能否认的事实.但事实的内容是什么?从这句子看不出来,只知道是一个不能否认的事实.
从语法上讲,同位语从句的先行词一般是抽象名词,如news,idea,information,hope,rumour,conclusion...定语从句无此限制.另外,在中学阶段,同位语从句的连接词一般是that,不可省略,that在句中无成分,无意义.

that引导同位语，在从句中不作任何成分。

这个句子不是同位语从句，因为同位语从句的that是不能省略的。例：This is the reason (that) he is late is THAT his clock was broken.这个句子中的第二个that后面跟的才是同位语从句。（）可以省略的原因是that在句子中不作任何成分，所以可以省略。

应该把它看成同位语从句,that可以省略

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