not used in the progressive tenses
to have information in your mind as a result of experience or because you have learned or been told it
Do you know his address?
The cause of the fire is not yet known.
All I know is that she used to work in a bank (= I have no other information about her) .
I know (that) people's handwriting changes as they get older.
It is widely known that CFCs can damage the ozone layer.
I knew where he was hiding.
I didn't know what he was talking about.
‘You've got a flat tyre.’ ‘I know.’
‘What's the answer?’ ‘I don't know.’
‘There's no one in.’ ‘ How do you know? ’
You know about Amanda's baby, don't you?
I don't know about you, but I'm ready for something to eat.
I know of at least two people who did the same thing.
‘Is anyone else coming?’ ‘ Not that I know of. ’
‘Isn't that his car?’ ‘ I wouldn't know./How should I know? (= I don't know and I am not the person you should ask.) ’
‘What are you two whispering about?’ ‘ You don't want to know (= because you would be shocked or wouldn't approve) .’
Does he know to come here (= that he should come here) first?
We know her to be honest.
Two women are known to have died.
to realize, understand or be aware of sth
As soon as I walked in the room I knew (that) something was wrong.
She knew she was dying.
I knew perfectly well what she meant.
I know exactly how you feel.
This case is hopeless and he knows it (= although he will not admit it) .
‘Martin was lying all the time.’ ‘ I should have known .’
to feel certain about sth
He knew (that) he could trust her.
I know it's here somewhere!
I don't know that I can finish it by next week.
‘You were right─someone's been spreading rumours about you.’ ‘I knew it!’
‘She's the worst player in the team.’ ‘Oh, I don't know (= I am not sure that I agree) ─she played well yesterday.’
to be familiar with a person, place, thing, etc.
I've known David for 20 years.
Do you two know each other (= have you met before) ?
She's very nice when you get to know her.
Knowing Ben , we could be waiting a long time (= it is typical of him to be late) .
This man is known to the police (= as a criminal) .
I know Paris well.
Do you know the play (= have you seen or read it before) ?
The new rules could mean the end of football as we know it (= in the form that we are familiar with) .
to think that sb/sth is a particular type of person or thing or has particular characteristics
It's known as the most dangerous part of the city.
She is best known for her work on the human brain.
He's known to be an outstanding physicist.
to give sb/sth a particular name or title
The drug is commonly known as Ecstasy.
Peter Wilson, also known as ‘the Tiger’.
to be able to recognize sb/sth
I couldn't see who was speaking, but I knew the voice.
She knows a bargain when she sees one.
to be able to distinguish one person or thing from another
I hope we have taught our children to know right from wrong.
to have learned a skill or language and be able to use it
Do you know any Japanese?
Do you know how to use spreadsheets?
only used in the perfect tenses
to have seen, heard or experienced sth
I've never known it (to) snow in July before.
He has been known to spend all morning in the bathroom.
to have personal experience of sth
He has known both poverty and wealth.
She may be successful now, but she has known what it is like to be poor.
very quickly or suddenly
We were whisked off in a taxi before we knew where we were.
to have no way of realizing or being aware that you have done sth wrong
‘I'm sorry, I called when you were in bed.’ ‘Don't worry─you weren't to know.’
used to emphasize that you do not know sth and that it is not important to you
She could be dead for all I know.
used to emphasize that you do not know sth
God knows what else they might find.
‘Where are they?’ ‘Goodness knows.’
used to emphasize the truth of what you are saying
She ought to pass the exam─goodness knows she's been working hard enough.
used to criticize sb's behaviour
I don't know how you can say things like that.
used to agree with sb or to show sympathy
‘What a ridiculous situation!’ ‘I know.’
used to introduce a new idea or suggestion
I know, let's see what's on at the theatre.
used to criticize sb by saying that they should realize or understand sth
You know as well as I do that you're being unreasonable.
to know sb/sth extremely well
She must know the play backwards by now.
to know what should be done, etc. better than other people
The doctor told you to stay in bed, and she knows best.
to be sensible enough not to do sth
He knows better than to judge by appearances.
to recognize sb without knowing them well
to have information or evidence that the opposite is true
He says he doesn't care about what the critics write, but I know different.
to be very aware of a fact and unable to deny or ignore it
He knew full well what she thought of it.
to be very familiar with sth
This is where I grew up. I know this area like the back of my hand.
to have very firm ideas about what you want to do
to know a lot about a particular subject or job
to be familiar with a place, subject, etc.
to have knowledge about sth from your own experience
to know where you can get an advantage for yourself
to make sure that people are informed about sth, especially by getting sb else to tell them
The President has let it be known that he does not intend to run for election again.
to tell sb about sth
Let me know how I can help.
to introduce yourself to sb
I made myself known to the hotel manager.
to behave badly, usually because you have not been taught the correct way to behave
to be very stupid or completely lacking in skill
to know nothing about a subject
to know nothing at all about sb/sth
to not know at all who sb is
to be so surprised by sth that you do not know how to react
to feel great embarrassment and not know how to react
to be so excited or confused that you cannot behave or think in a sensible way
to have an easy life without realizing how easy it is
You people without kids don't know you're born.
used to say that it is impossible to say what might happen
There's no knowing how he'll react.
used to say that sb knows nothing about the subject you are talking about
What does he know about football, anyway?
used to express surprise
Well, what do you know? Look who's here!
used when you are thinking of what to say next
Well, you know, it's difficult to explain.
used to show that what you are referring to is known or understood by the person you are speaking to
Guess who I've just seen? Maggie! You know─Jim's wife.
You know that restaurant round the corner? It's closed down.
used to emphasize sth that you are saying
I'm not stupid, you know.
used to introduce an interesting or surprising opinion, piece of news, etc.
You know something? I've never really enjoyed Christmas.
（不说出名称）你知道是谁 / 什么
used to refer to sb/sth without mentioning a name
used to say that you can never be certain about what will happen in the future, especially when you are suggesting that sth good might happen
to be confident that you know sth, especially when you actually do not
He thinks he knows all the answers.
to be in poor condition
Our car has seen better days!
used to say that it is easier and wiser to stay in a bad situation that you know and can deal with rather than change to a new situation which may be much worse
used to say that you think you know, remember, understand, etc. sth but you cannot be completely sure, especially because you do not know all the facts
As far as we knew, there was no cause for concern.
As far as I can see, you've done nothing wrong.
She lived in Chicago, as far as I can remember.
old enough to behave in a more sensible way than you actually did
to know sth perfectly so that you can repeat it at any time without having to think about it
He had all the answers off pat.
向某人演示 / 知道 / 学会如何做某事
to show sb/know/learn how a particular job should be done
了解 / 透露有用的（或有趣的、意外的）信息；有所了解 / 披露；见多识广
to know/tell sb some useful, interesting or surprising information about sb/sth
She's been married five times, so she knows a thing or two about men!
having more information about sth than most people
Somebody in the know told me he's going to resign.
the fact of being aware of information that is known to few people
- he is always in the know
accept (someone) to be what is claimed or accept his power and authority
- The Crown Prince was acknowledged as the true heir to the throne
- We do not recognize your gods
be familiar or acquainted with a person or an object
- She doesn't know this composer
- Do you know my sister?
- We know this movie
- I know him under a different name
- This flower is known as a Peruvian Lily
be cognizant or aware of a fact or a specific piece of information;possess knowledge or information about
- I know that the President lied to the people
- I want to know who is winning the game!
- I know it's time
be aware of the truth of something;have a belief or faith in something;regard as true beyond any doubt
- I know that I left the key on the table
- Galileo knew that the earth moves around the sun
know how to do or perform something
- She knows how to knit
- Does your husband know how to cook?
have fixed in the mind
- I know Latin
- This student knows her irregular verbs
- Do you know the poem well enough to recite it?
have firsthand knowledge of states, situations, emotions, or sensations
- I know the feeling!
- have you ever known hunger?
- I have lived a kind of hell when I was a drug addict
- The holocaust survivors have lived a nightmare
- I lived through two divorces
perceive as familiar
- I know this voice!
be able to distinguish, recognize as being different
- The child knows right from wrong
know the nature or character of
- we all knew her as a big show-off
have sexual intercourse with
- This student sleeps with everyone in her dorm
- Adam knew Eve
- Were you ever intimate with this man?
近义词: sleep together,roll in the hay,love,make out,make love,sleep with,get laid,have sex,do it,be intimate,have intercourse,have it away,have it off,screw,fuck,jazz,eff,hump,lie with,bed,have a go at it,bang,get it on,bonk