what能引导什么从句

关系代词what可引导主语从句、宾语从句、表语从句等；它没有疑问的含义，相当于that、which、the thing(s) that(which),或the…that(which),从句表示的是事物；

主语从句，例如What is beautiful is not always good.美的东西并不总是好的。

宾语从句。例如

I could hardly believe what he had told me.

我简直不敢相信他所告诉我的。

3．表语从句。

例如

Books are what we need most.

书是我们最需要的东西。

只能举例子

1、Do you know what i did just now?(宾语从句）

2、What he said is very improtant(主语从句）

3、That is just what i want (表语从句）

4、What he said that we won the game makes me happy.