知道的英语短语： know about。

know：v.知道;知悉;了解;认识到;懂得;意识到;确信;确知;肯定；

第三人称单数： knows现在分词： knowing过去式： knew过去分词： known

Life isn't like in the movies, you know.

你知道，生活不像在电影里那样。

I know you did it ─ I just want to know why.

我知道这是你干的，我只是想知道为什么。

Does he know to come here first?

他知道要先到这儿来吗？

Had I known that I would never have come.

要是早知道，我绝不会来的。