题目

定语从句里的关系代词能不能既起连接作用,同时又充当句子成分?
eg.The Art class that I took.（可能例句不太对.）

提问时间：2021-03-20

答案

必须的.这也是有时区别that引导定语从句和主语从句宾语从句同位语从句补语从句的标志.在名词性从句里,that只起到连接作用,不充当任何成分.而定语从句里that不仅连接而且还要代替先行词在从句里充当主宾补状成分.
i don't know that he was a student.不充当成分,宾语从句.
that he was a student surprised me.不充当成分主语从句.
this is the fact that he was a student.不充当成分,同位语从句.
this is the fact that he told me yesterday.定语从句,that充当成分.