从句就三大类：定语从句，名词性从句，和状语从句

这也是高考常考的三大类

其中定语从句分为限制性定语从句和非限制性定语从句（标志是,which居多）

名词性从句分为主语从句

What i said is important宾语从句

You should remember what I said

表语从句

That is what he said

同位语从句

The news that he won made us surprised