问题描述:
This is what I can tell you.
He did what he could to help his son.
这是什么从句?怎样演变过来的?what 指代什么?
He did what he could to help his son.
这是什么从句?怎样演变过来的?what 指代什么?
问题解答:
我来补答展开全文阅读