It must have been they who gave the signal.为什么是they而不是them呢?

问题描述:

It must have been they who gave the signal.为什么是they而不是them呢?
1个回答 分类:英语 2014-09-27

问题解答:

我来补答
因为后面有个定语从句who gave the signal.只能用they ,而them后不能跟定语从句
 
 
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