Who are you?

你是谁？

I'm going home.

我正要回家。

I've forgotten what he said his address was.

我忘记了他说他的地址是什么。

They don't know when the wedding will be.

他们不知道婚礼将是什么时候。

What size shoes do you wear?

你穿的鞋子是什么尺寸的？

It was after dark when we got back,and we were all tired.

我们回来时天已经黑了，并且我们都很疲倦。