疑问代词在引起从句时，都称为连接代词，包括who、whom、whose、what、which、whoever、whomever、whichever、whatever，一共九个，即除了whose后不能加“-ever”后缀，其余都行。

相关介绍：

主语从句

It hasn’t been announced who won the prizes.还没宣布谁获奖。

It is clear enough what she meant. 她是什么意思很清楚。

宾语从句

I don’t care what they think. 他们怎么想我不管。

Ask her which she wants. 问她要哪一个。

表语从句

The question is who(m) we should trust.问题是我们应当相信谁。

What I want to know is which road we should take.我想知道的是我们应走哪条路。

状语从句

Wherever you go, whatever you do, I will be right here waiting for you.无论你去哪里，无论你做了什么，我都会在这里等你。