10 English Expressions With The Word KNOW

#1 – For All I Know
This expression means “according to the information I currently have” but implies uncertainty, like you don’t actually have much information.

I’m not eating those mushrooms you found in the woods. They could be poisonous for all I know.

#2 – Know Your Stuff
If someone knows his/her stuff, it means the person is very knowledgeable and skilled in that area.

This carpenter really knows his stuff because he has 30 years of experience.

#3 – Know The Drill
To know the drill means to be familiar with a standard procedure or what is supposed to be done.

Nicole has organized the past three conferences, so she knows the drill.

#4 – Know Where You Stand
To know where you stand means to be aware of your current position/situation.

I know where I stand and I’m not authorized to make that decision without consulting the director.

#5 – It Takes One To Know One
This phrase is used to insult someone by saying that they are the same as the other person who they are criticizing/accusing/complaining about.

Bob says that John is a hypocrite, but it takes one to know one. (= Bob is also a hypocrite)

#6 – You Don’t Know The Half Of It
This expression means someone only knows about a small part of a situation, but there is a much bigger issue that they are not aware of.

“I heard you’ve been a bit busy with work these days.”
“Oh, you don’t know the half of it! Not only have I been working 60-hour weeks, but also my kids got sick and the house needed some urgent repairs.”

#7 – Not Know What Hit (Someone)
If someone doesn’t know what hit them, it means they are very surprised and shocked by an unexpected event that has a big negative impact on them.

When my wife left me for no reason, I didn’t know what hit me. I’d been under the impression that our relationship was fine.

#8 – Know No Bounds
This expression describes something that is or seems to be without limit.

She’s always coming up with new ideas. Her creativity knows no bounds.

#9 – What Does He/She Know?
This question is used to say that someone does NOT know anything about a particular topic.

I wish my brother would stop giving me parenting advice. What does he know? He doesn’t even have kids.

#10 – Who Knows?
This expression means that nobody probably knows the answer.

“How long is this flight going to be delayed?”
Who knows? I guess it depends on how long it keeps raining.”