Ý nghĩa và cách sử dụng của từ know trong tiếng anh

Ý nghĩa của từ vựng know

knowverb
hiểu biết, nhận biết
/nəʊ/

Nguồn gốc của từ vựng know

Từ "know" có nguồn gốc từ tiếng Anh cổ và bắt nguồn từ tiếng Đức nguyên thủy "*kunniz", có nghĩa là "to know how" hoặc "có thể". Từ tiếng Đức nguyên thủy này được cho là được hình thành từ hai phần: "*kunthiz", có nghĩa là "có vẻ" hoặc "xuất hiện", và "*(-h)iz", là hậu tố hình thành động từ. Từ tiếng Anh cổ "cunnan" hoặc "cunnon" có nghĩa là "to know how to do something" hoặc "có thể", và thường được dùng kết hợp với các từ khác để tạo thành cụm từ như "Ic cunne wel" (Tôi biết rõ) hoặc "Hwæt ic cunne" (Những gì tôi biết). Theo thời gian, ý nghĩa của từ "know" đã mở rộng không chỉ bao gồm kiến thức về cách làm một việc gì đó mà còn bao gồm kiến thức về một việc gì đó hoặc sự công nhận một việc gì đó. Ngày nay, từ "know" là một thuật ngữ phổ biến và đa năng được sử dụng trong nhiều ngữ cảnh khác nhau.

Tóm tắt từ vựng know

type động từ knew; known

meaning biết; hiểu biết

example to know about something: biết về cái gì

example to know at least three languages: biết ít nhất ba thứ tiếng

example to know how to play chess: biết đánh cờ

meaning biết, nhận biết; phân biệt được

example to know somebody at once: nhận biết được ai ngay lập tức

example to know one from another: phân biệt được cái này với cái khác

meaning biết, quen biết

example to know by sight: biết mặt

example to know by name: biết tên

example to get to know somebody: làm quen được với ai

type danh từ (thông tục)

meaning to be in the know biết rõ sự việc, biết rõ vấn đề; biết điều mà mọi người chưa biết

example to know about something: biết về cái gì

example to know at least three languages: biết ít nhất ba thứ tiếng

example to know how to play chess: biết đánh cờ

Ví dụ của từ vựng knowhave information

to have information in your mind as a result of experience or because you have learned or been told it

có thông tin trong đầu bạn nhờ kinh nghiệm hoặc vì bạn đã học được hoặc được cho biết về nó

No one knows the answer.
Không ai biết câu trả lời.
I need to know your name.
Tôi cần biết tên của bạn.
The truth about what happened is not yet known.
Sự thật về những gì đã xảy ra vẫn chưa được biết.
All I know is that she used to work in a bank (= I have no other information about her).
Tất cả những gì tôi biết là cô ấy từng làm việc ở ngân hàng (= tôi không có thông tin nào khác về cô ấy).
I know (that) people’s handwriting changes as they get older.
Tôi biết (rằng) chữ viết tay của mọi người thay đổi khi họ già đi.

Ví dụ của từ vựng knowrealize

to realize, understand or be aware of something

để nhận ra, hiểu hoặc nhận thức được một cái gì đó

As soon as I walked in the room I knew (that) something was wrong.
Ngay khi bước vào phòng tôi đã biết có điều gì đó không ổn.
She knew she was dying.
Cô biết mình sắp chết.
‘Martin was lying all the time.’ ‘I should have known.’
“Martin đã nói dối mọi lúc.” “Lẽ ra tôi phải biết.”
I knew perfectly well what she meant.
Tôi biết rất rõ ý cô ấy là gì.
I know exactly how you feel.
Tôi biết chính xác bạn cảm thấy thế nào.

Ví dụ của từ vựng knowfeel certain

to feel certain about something

cảm thấy chắc chắn về điều gì đó

He knew (that) he could trust her.
Anh ấy biết (rằng) anh ấy có thể tin tưởng cô ấy.
I know it's here somewhere!
Tôi biết nó ở đâu đó ở đây!
I know things will turn out all right.
Tôi biết mọi chuyện sẽ ổn thôi.
I don't know that I can finish it by next week.
Tôi không biết liệu tôi có thể hoàn thành nó vào tuần tới không.
I just knew that it was something I wanted to do.
Tôi chỉ biết rằng đó là điều tôi muốn làm.

Ví dụ của từ vựng knowbe familiar

to be familiar with a person, place, thing, etc.

làm quen với một người, địa điểm, đồ vật, v.v.

I've known David for 20 years.
Tôi đã biết David được 20 năm.
Do you two know each other (= have you met before)?
Hai bạn có biết nhau không (= bạn đã gặp nhau trước đây chưa)?
She was a secretary when I first knew her.
Cô ấy là thư ký khi tôi mới biết cô ấy.
She's very nice when you get to know her.
Cô ấy rất tốt khi bạn làm quen với cô ấy.
Knowing Ben, we could be waiting a long time (= it is typical of him to be late).
Biết Ben, chúng tôi có thể chờ đợi rất lâu (= điển hình là anh ấy đến muộn).

Ví dụ của từ vựng knowskill/language

to have learned a skill or language and be able to use it

đã học được một kỹ năng hoặc ngôn ngữ và có thể sử dụng nó

Do you know any Japanese?
Bạn có biết tiếng Nhật nào không?
Do you know how to use spreadsheets?
Bạn có biết cách sử dụng bảng tính không?

Ví dụ của từ vựng knowreputation

to think that somebody/something is a particular type of person or thing or has particular characteristics

nghĩ rằng ai đó/cái gì đó là một loại người hoặc vật cụ thể hoặc có những đặc điểm cụ thể

He has become widely known as an expert in child psychology.
Ông đã được biết đến rộng rãi như một chuyên gia về tâm lý trẻ em.
It's known as the most dangerous part of the city.
Nó được biết đến là khu vực nguy hiểm nhất của thành phố.
She is best known for her work on the human brain.
Cô được biết đến nhiều nhất với công việc nghiên cứu về bộ não con người.
He is internationally known for his work with vaccines.
Ông được cả thế giới biết đến nhờ công việc nghiên cứu vắc xin.
He's known to be an outstanding physicist.
Ông được biết đến là một nhà vật lý xuất sắc.

Ví dụ của từ vựng knowgive name

to give somebody/something a particular name or title

đặt cho ai/cái gì một cái tên hoặc chức danh cụ thể

Ví dụ của từ vựng knowrecognize

to be able to recognize somebody/something

có thể nhận ra ai/cái gì đó

Ví dụ của từ vựng knowunderstand the difference

to understand the difference between one person or thing and another

để hiểu sự khác biệt giữa một người hoặc vật và người khác

Ví dụ của từ vựng knowexperience

to have seen, heard or experienced something

đã thấy, nghe hoặc trải nghiệm điều gì đó

to have personal experience of something

có kinh nghiệm cá nhân về điều gì đó

Từ, cụm từ đồng nghĩa, có liên quan tới từ vựng know

Thành ngữ của từ vựng know

as far as I know | as far as I can remember, see, tell, etc.

used to say that you think you know, remember, understand, etc. something 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.

before you know where you are

very quickly or suddenly

We were whisked off in a taxi before we knew where we were.

be not to know

to have no way of realizing or being aware that you have done something wrong

‘I'm sorry, I called when you were in bed.’ ‘Don't worry—you weren't to know.’

better the devil you know (than the devil you don’t)

(saying)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 that may be much worse

for all you, I, they, etc. know

(informal)used to emphasize that you do not know something and that it is not important to you

She could be dead for all I know.

God/goodness/Heaven knows

used to emphasize that you do not know something

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.

have/know all the answers

(informal, often disapproving)to be confident that you know something, especially when you actually do not

He thinks he knows all the answers.

have/know something off pat

to know something perfectly so that you can repeat it at any time without having to think about it

He had all the answers off pat.

have seen/known better days

(humorous)to be in poor condition

Our car has seen better days!

I don’t know how, why, etc…

(informal)used to criticize somebody’s behaviour

I don't know how you can say things like that.

if (the) truth be known/told

used to tell somebody the true facts about a situation, especially when these are not known by other people

If the truth be known, I was afraid to tell anyone.

I know

used to agree with somebody 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.

know something as well as I do

used to criticize somebody by saying that they should realize or understand something

You know as well as I do that you're being unreasonable.

know somebody/something backwards

(especially British English, informal)to know somebody/something extremely well

She must know the play backwards by now.

know best

to know what should be done, etc. better than other people

The doctor told you to stay in bed, and she knows best.

know better (than that/than to do something)

to be sensible enough not to do something

He knows better than to judge by appearances.

know somebody by sight

to recognize somebody without knowing them well

know different/otherwise

(informal)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.

know full well

to be very aware of a fact and unable to deny or ignore it

He knew full well what she thought of it.

know somebody/something inside out | know somebody/something like the back of your hand

(informal)to be very familiar with somebody/something

This is where I grew up. I know this area like the back of my hand.

know your own mind

to have very clear and definite ideas about what you want to do

know your stuff

(informal)to know a lot about a particular subject or job

know/tell somebody a thing or two (about somebody/something)

(informal)to know/tell somebody some useful, interesting or surprising information about somebody/something

She's been married five times, so she knows a thing or two about men!

know/learn/find something to your cost

to know something because of something unpleasant that has happened to you

She is a tough competitor, as I know to my cost.

know your way around

to be familiar with a place, subject, etc.

know what you’re talking about

(informal)to have knowledge about something from your own experience

I worked there for 20 years, so I know what I'm talking about.

know which side your bread is buttered

(informal)to know where you can get an advantage for yourself

let it be known/make it known that…

(formal)to make sure that people are informed about something, especially by getting somebody else to tell them

The President has let it be known that he does not intend to run for election again.

let somebody know

to tell somebody about something

I don't know if I can come, but I'll let you know tomorrow.
Let me know how I can help.
Please let me know if there's anything I can do to help.

Lord knows…

used to emphasize what you are saying

Lord knows, I tried to teach her.

Lord (only) knows (what, where, why, etc.)…

(informal)used to say that you do not know the answer to something

‘Why did she say that?’ ‘Lord knows!’

make yourself known to somebody

to introduce yourself to somebody

I made myself known to the hotel manager.

not know any better

to behave badly, usually because you have not been taught the correct way to behave

Don’t blame the children—they don’t know any better.

not know your arse from your elbow

(British English, offensive, slang)to be very stupid; to have absolutely no skill

not know beans about something

(North American English, informal)to know nothing about a subject

I don’t know beans about making movies.

not know the first thing about somebody/something

to know nothing at all about somebody/something

I’m afraid I don’t know the first thing about cars.

not know, etc. the first thing about something/somebody

to know nothing at all about something/somebody

We’ve lived next to him for years, but we still don’t know the first thing about him.

not know somebody from Adam

(informal)to not know at all who somebody is

not know what hit you

(informal)to be so surprised by something that you do not know how to react

not know where to look

(informal)to feel very embarrassed and not know how to react

not know whether you’re coming or going

(informal)to be so excited or confused that you cannot behave or think in a sensible way

not know you are born

(British English, informal)to have an easy life without realizing how easy it is

You people without kids don't know you're born.

not want to know (about something)

(informal)to take no interest in something because you do not care about it or it is too much trouble

I've tried to ask her advice, but she doesn't want to know (= about my problems).
‘How much was it?’ ‘You don't want to know’ (= it is better if you don't know).

old enough to know better

old enough to behave in a more sensible way than you actually did

show somebody/know/learn the ropes

(informal)to show somebody/know/learn how a particular job should be done

there’s no knowing

used to say that it is impossible to say what might happen

There's no knowing how he'll react.

what does… know?

used to say that somebody knows nothing about the subject you are talking about

What does he know about football, anyway?

what do you know?

(informal)used to express surprise

Well, what do you know? Look who's here!

(know) what’s what

(informal)(know) what things are useful, important, etc.

She certainly knows what's what.

you know

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 something that you are saying

I'm not stupid, you know.

you know something/what?

(informal)used to introduce an interesting or surprising opinion, piece of news, etc.

You know something? I've never really enjoyed Christmas.

you know who/what

(informal)used to refer to somebody/something without mentioning a name

you never know

(informal)used to say that you can never be certain about what will happen in the future, especially when you are suggesting that something good might happen