know

Who knows the answer?

谁知道答案？

There are instructions telling you everything you need to know.

操作指南会告诉你所有须知事项。

Didn’t you know that?

你不知道那件事吗？

I know all about David and what he’s been up to!

我对戴维和他一直在干什么都知道得一清二楚！

Let me know (= tell me ) what time you’re planning to arrive.

请告诉我你打算什么时候到。

I thought you’d want to know immediately.

我以为你想马上知道。

If you must know, I was with James last night (= used when you are angry because someone wants to know something ).

如果你非要知道的话，我昨晚是和詹姆斯在一起。

How did he know (= how did he find information about ) our names?

他是怎么知道我们姓名的？