在英语定语从句中，用“介词+关系代词”在从句里缺成分用还是不缺成分用？

Question

如题所述

Answer 1

介词＋关系代词＝关系副词，关系副词在从句中作状语，也就是说，没有他，从句的主谓（宾）是齐全的，不缺主要成分，可以参照ｍｏｏｎｌｉｇｈｔ给的例子

Answer 2

定语从句的所有的关系词在句子中都是充当句子成分的
介词+关系代词 分两种情况
一种是关系副词可以等同于介词+关系代词
例如：1.I will never forget the day when I met him.
I will never forget the day on which I met him.
因为具体到某一天，所以when 可以用 on which 来替换
2. He didn't want to recall the year when his girl left.
He didn't want to recall the year in which his girl left.
另一种是动词与介词的固定搭配。
例如：I know the girl to/with whom John is talking.
这句话中，talk to/with sb.是固定搭配。