know，英语单词，及物动词、不及物动词，作及物动词时意为“知道、认识、懂得”，作不及物动词时意为“了解、熟悉、确信”。

英 [nəʊ]   美 [noʊ]  

v.知道；知悉；了解；认识到；懂得；意识到；确信；确知；肯定

I don't know what to make of the new manager.

这位新经理，我不知道怎么评价他才好。

Some people don't know when they're well off.

有些人身在福中不知福。

There were a whole lot of people I didn't know.

有许多人我都不认识。

I don't know what you're on about.

我不懂你在谈什么。

I don't know how she puts up with him.

我不明白她怎么受得了他。

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。

I didn't know how much to bring.

我不知道该带多少。