I don't know what the teacher is saying中what做什么成分

I don't know what the teacher is saying中what做什么成分
I don't know what the teacher is saying中what做什么成分

I don't know what the teacher is saying中what做什么成分
what 引导宾语从句
作连接代词

what the teacher is saying整个做宾语，就是所谓的宾语从句
what引导宾语从句

what the teacher is saying这是一句由what引导的宾语从句， what the teacher is saying做的是know的宾语，what在从句中是做saying的宾语。

WHAT做后面宾语从句里面的宾语