I don't know

说不上───I don't know

I don't know about the rest of you, but I'm hungry.───我不知道你们怎么样，但我是饿了。

"Hey, I don't know what you're talking about," Russo objected.───“喂，我不知道你在说些什么，”拉索反驳道。

I don't know why he bothers me with this kind of rubbish.───我不明白他为何用这种烂事来烦我。

I don't know why I never thought of that.───我怎么就从未想到过那一点。

I don't know if you ever read any of his books.───我不知道你是否读过他写的书。

I don't know the play, I've just come to see it.───我不了解这部剧，只是来看看。

I don't know that it's made the decision any easier.───我不认为这对作出决定有丝毫帮助。

Frankly, I don't know what Paul sees in her.───坦白地说，我不知道保罗看上她什么了。

I don't know what he intends.

I don't know. Just relax, I'll help you.

I don't know how you can eat that stuff!

I don't know who has splintered the plates?

I don't know how to fill out this form.