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BNC: 49 COCA: 47
knowverbuk/nəʊ/ us/noʊ/ knew, known

know verb HAVE INFORMATION

A1 [ I or T, not continuous ] to have information in your mind知道，熟悉，了解

"Where did he go?" "I don't know."“他上哪儿去了？”“我不知道。”
"What does it cost?" "Ask Kate. She'll know."“这个要多少钱？”“问凯特，她知道。”
She knows the name of every kid in the school.她知道学校里每个孩子的名字。
I don't know anything about this.我对此一无所知。
[ + question word ] We don't know when he's arriving.我们不知道他什么时候到。
I don't know (= understand) what all the fuss is about.我不明白这么大惊小怪干什么。
[ + (that) ] I just knew (that) it was going to be a disaster.我就知道这会是场灾难。
She knew (= was aware) (that) something was wrong.她知道出错了。
[ + obj + to infinitive ] Even small amounts of these substances are known to cause skin problems.我们知道这类物质即使是一丁点也会损害皮肤。
formal The authorities know him to be (= know that he is) a cocaine dealer.当局知道他是个可卡因贩子。

A1 [ T not continuous ] used to ask someone to tell you a piece of information（用于询问信息）知道

Do you know the time?你知道几点了吗？
[ + question word ] Do you know where the Post Office is?你知道邮局在哪儿吗？

A2 [ I or T, not continuous ] to be certain确知；确信

[ + (that) ] I know (that) she'll be really pleased to hear the news.我确信她知道这个消息会很高兴的。
[ + question word ] I don't know whether I should tell her or not.我不知道是否该告诉她。
The party is at Sarah's house as/so far as I know (= I think but I am not certain).据我所知，聚会在萨拉家举行。

More examples

"Will the table fit in here?" "I don't know - let's measure it."

I still don't know whether she's coming or not.

It's a bit suspicious that no one knows where he was at the time of the murder.

No one knew how many troops had died in combat.

"He's been married three times." "Oh, really? I didn't know that!"

know verb BE FAMILIAR WITH

B1 [ T not continuous ] to be familiar with or have experience and understanding of认识；熟悉

I've known Daniel since we were at school together.从我们一起上学开始我就认识丹尼尔。
She grew up in Paris so she knows it well.她在巴黎长大，对那儿很熟悉。
I've seen the film "Casablanca" so many times that I know a lot of it by heart (= I know it in my memory).电影《卡萨布兰卡》我看过很多遍，对很多情节我都烂熟于心。
Knowing Karen (= from my experience of her in the past), she'll have done a good job.据我对萨拉的了解，她会干得很好。
formal I have known (= experienced) great happiness in my life.我的人生中体味过极大的欢乐。

B1 [ I or T, not continuous ] also know about If you know a subject, you are familiar with it and understand it.知晓，通晓

Do you know about computers?你懂电脑吗？
She knows her subject inside out (= very well).她精通自己的学科。

A2 [ T not continuous ] If you know a language, you can speak and understand it.通晓（语言）；会

Do you know any French?你会法语吗？

[ T not continuous ] to recognize someone or something认出；辨认出

That's Peter alright - I'd know him anywhere!那就是彼得——到哪儿我都能认出他！
I know a bargain when I see one.是不是好买卖，我一看就知道。
know how to do sth

A2 to be able to do something because you have the necessary knowledge懂得怎么做

Do you know how to print on this computer?你会用这台电脑打印吗？
get to know sb/sth

B1 to spend time with someone or something so that you gradually learn more about him, her, or it逐渐熟悉，逐渐了解

The first couple of meetings are for the doctor and patient to get to know each other.开始的几次会面使医生和病人相互逐渐熟悉。
I'll need a few weeks to get to know the system.我需要几周的时间来熟悉这一系统。
know sb by name

to have heard the name of a person but not seen or talked to them听说过（某人）

know sb by sight

If you know someone by sight, that person looks familiar to you, but is not a friend of yours.与（某人）只是面熟

More examples

I know the first verse of the song, but I don't know what comes next.

If you don't know what the word means, look it up in a dictionary.

It's always awkward when you meet someone you know, but you can't remember their name.

He knows a lot of people, but only one or two that he'd call close friends.

I hope she knows where to get off the bus.

Idiom(s)

before you know it
be known to be/do sth
Goodness/God/Heaven/Christ knows
how was I to know?
I don't know
I don't know about you but...
I don't know how, what, why, etc.
I know
know sth back to front
know sth like the back of your hand
know your own mind
know your place
know your stuff
know your way around sth
know all the answers
know all there is to know about sth
know best
know better (than to do sth)
know better (than sb)
know the score
know what you are doing
know what you are talking about
(you) know what I mean
know what it is (like) to
know what's what
know which side your bread is buttered (on)
sth knows no bounds
not know sb from Adam
not know the first thing about sth
not know the meaning of the word
not know what has hit you
not know where to put yourself
not know where/which way to turn
not know whether to laugh or cry
not that I know of
there's no knowing
(well) what do you know!
wouldn't know sth if you fell over one/it
you know
you know something?
you never know

Phrasal verb(s)

know sth from sth
know of sb/sth
knownounuk/nəʊ/ us/noʊ/ informal
be in the know

to have knowledge about something that most people do not have知情，熟知内幕

This resort is considered by those who are in the know to have the best downhill skiing in Europe.了解情况的人认为，这个度假胜地有着欧洲最理想的滑雪坡道。

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