The verb 'know' is used in many idiomatic expressions. Each idiom or expression has a definition and two example sentences to help understanding of these common idiomatic expressions with 'know'. Once you have studied these expressions, test your knowledge with this quiz testing idioms and expressions with know.
be in the know
Definition: have inside knowledge about a situation
Talk to Tim. He's in the know.
Are you in the know about the current crisis?
Definition: have knowledge about how one should behave
You know better than to do that!
I wish he had acted differently. He certainly knew better!
Definition: 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
Definition: 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
Definition: 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
Definition: completely understand someone or something
She knows Jerry like a book.
I think Peter knows the Johnson account like a book. Ask him.
know someone by sight
Definition: be able to recognize someone
I know Peter by sight. I'll got to the airport.
Do you know Mary by sight?
know something from memory
Definition: have something memorized
She knows the piece from memory.
Can you sing "New York, New York" from memory?
know something inside out
Definition: 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.
know the ropes
Definition: 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
Definition: 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.
Once you have studied these expressions, test your knowledge with quiz testing idioms and expressions with know.