一年级刚开始学习英语，日常用的语句中的复合句都以口语化的形式传授。

I know who you are. 

That is what I want to know. 

I want to know where you are from. 

You said what I want to say. 

I wonder why you came back. 

I know how you came. 

I enjoy what I have. 

I am eating what you bought.