The villegd is a very different place from___it was when i was a boy.

题目

The villegd is a very different place from___it was when i was a boy.
为什么是what不是that?from后面引导的是定语从句吗?如果是,为什么?如果不是,又是什么从句呢?

答案

The village is a very different place from what it was when I was a boy.
主语 系动词 表语 状语
from （what it was） when I was a boy.
宾从（作介词宾语） 时间状语从句
different from的结构, “与.不同”
what it was这个宾语从句中缺少表语故用what, 不能用that(在宾语从句中不做成分)