know是个大家都认识的英语单词，不过和know有关的短语大家却不见得都知道是什么意思，一起来看看吧。 (来源：专业英语学习网站 http://www.EnglishCN.com)
be in the know
英英解释： have inside knowledge about a situation
Talk to Tim. He's in the know。
Are you in the know about the current crisis?
英英解释： have knowledge about how one should behave
You know better than to do that!
I wish he had acted differently. He certainly knew better!
英英释义： understanding of how a task should be done
I'd call technical support and ask someone with the know-how。
Do you have the know-how to upgrade our servers?
know the tricks of the trade
英英释义： possess the skills and knowledge to be successful in a particular task
Let's ask Tom. He knows all the tricks of the trade。
I think we need to bring in a specialist who knows the tricks of the trade。
know one's ABCs
英英释义： to understand and be capable of doing the basics
I don't think he should do this. He doesn't even know his ABCs。
Do you know the ABCs of programming?
know someone or something like a book
英英释义： completely understand someone or something
She knows Jerry like a book。
I think Peter knows the Johnson account like a book. Ask him。
Definition: be able to recognize someone
know sb by sight
I know Peter by sight. I'll got to the airport。
Do you know Mary by sight?
know something from memory
英英释义： have something memorized
She knows the piece from memory。
Can you sing "New York, New York" from memory?
know the ropes
英英释义： know how to do something
We need to bring somebody in who knows the ropes。
I've never used Linux so I really don't know the ropes of installation。
know the score
英英释义： understand the facts about a situation
I know the score. Don't try to fool me。
Please stop making excuses. I know the score and I know you are to blame。
know something inside out
英英释义： have completely knowledge of something
Susan is the expert. She's knows this stuff inside out。
Let me do it. I know this inside out。