what开头引导什么从句

　　引导宾语从句是what一般在行为动词之后,

　　如:

　　I don't know what I'm going to do?

　　He has got what he wants.

　　引导表语从句是what一般在系动词之后,

　　如:

　　A computer is what I want.

　　That iswhat I need .