know的例句：
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。
These problems are all in your mind, you know.
你知道，这些问题都只是你的`凭空想象而已。
Some people don't know when they're well off.
有些人身在福中不知福。
You'll like her once you get to know her.
你一旦了解了她就会喜欢她的。
There were a whole lot of people I didn't know.
有许多人我都不认识。