know

英[nəʊ]美[noʊ]

【不規則形式】 knew , known

(not used in the progressive tenses 不用於進行時)

知悉 have information

1

~ (of/about sth)

知道；知悉；了解

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

[VN] Do you know his address?

你知道他的地址嗎？

The cause of the fire is not yet known.

火災的原因尚不清楚。

All I know is that she used to work in a bank (= I have no other information about her) .

我只知道她曾在銀行工作過。

[V (that)] I know (that) people's handwriting changes as they get older.

我知道人們的筆跡隨著年齡的增長而變化。

[VN that] It is widely known that CFCs can damage the ozone layer.

眾所周知氯氟烴會破壞臭氧層。

[V wh-] I knew where he was hiding.

我知道他藏在哪裡。

I didn't know what he was talking about.

我不知道他在談什麼。

[V] ‘You've got a flat tyre.’ ‘I know.’

“你的車胎癟了。”“我知道。”

‘What's the answer?’ ‘I don't know.’

“答案是什麼？”“我不知道。”

‘There's no one in.’ ‘ How do you know? ’

“裡邊一個人都沒有。”“你怎麼知道呢？”

You know about Amanda's baby, don't you?

你知道阿曼達的小寶寶吧？

I don't know about you, but I'm ready for something to eat.

不管你怎麼樣，反正我要吃點東西。

I know of at least two people who did the same thing.

我知道至少有兩人干過同樣的事。

‘Is anyone else coming?’ ‘ Not that I know of. ’

“還有別的人要來嗎？”“據我所知沒有了。”

‘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.) ’

“那不是他的汽車嗎？”“我怎麼會知道呢？”

(informal) ‘What are you two whispering about?’ ‘ You don't want to know (= because you would be shocked or wouldn't approve) .’

“你們倆在說什麼悄悄話？”“你還是不知道的好。”

[V to inf] Does he know to come here (= that he should come here) first?

他知道要先到這兒來嗎？

[VN to inf] We know her to be honest.

我們知道她很誠實。

Two women are known to have died.

據悉兩名婦女死了。

see also need-to-know

意識到 realize

2

認識到；懂得；意識到

to realize, understand or be aware of sth

[V (that)] As soon as I walked in the room I knew (that) something was wrong.

我剛走進屋就意識到出了事。

She knew she was dying.

她知道自己快死了。

[V wh-] I knew perfectly well what she meant.

我完全懂她的意思。

I know exactly how you feel.

我非常清楚你的感受。

[VN] This case is hopeless and he knows it (= although he will not admit it) .

這個案子毫無希望，這一點他是清楚的。

[V] ‘Martin was lying all the time.’ ‘ I should have known .’

“馬丁一直在撒謊。”“我本該察覺到的。”

確信 feel certain

3

確信；確知；肯定

to feel certain about sth

[V (that)] He knew (that) he could trust her.

他確信她是可以信賴的。

I know it's here somewhere!

我肯定它在這兒某個地方！

I don't know that I can finish it by next week.

我沒有把握能在下周完成。

[VN] ‘You were right─someone's been spreading rumours about you.’ ‘I knew it!’

“你說得對——有人一直在散布你的謠言。”“我早就知道！”

[V] ‘She's the worst player in the team.’ ‘Oh, I don't know (= I am not sure that I agree) ─she played well yesterday.’

“她是最糟的隊員。”“哦，是嗎？——她昨天表現可不錯。”

see also don't-know

熟悉 be familiar

4

[VN] 熟悉；認識；了解

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

I've known David for 20 years.

我認識戴維已有20年了。

Do you two know each other (= have you met before) ?

你們倆認識嗎？

She's very nice when you get to know her.

你了解她以後就會覺得她非常可愛。

Knowing Ben , we could be waiting a long time (= it is typical of him to be late) .

本這個人我們了解，能叫我們等很長時間。

This man is known to the police (= as a criminal) .

這男人是在警方掛了號的。

I know Paris well.

我很熟悉巴黎。

Do you know the play (= have you seen or read it before) ?

你知道這齣戲嗎？

The new rules could mean the end of football as we know it (= in the form that we are familiar with) .

這些新規則可能意味著我們熟悉的足球終結了。

名聲 reputation

5

~ sb/sth as sth | ~ sb/sth for sth

[usually passive] 把…看作是；認為…是

to think that sb/sth is a particular type of person or thing or has particular characteristics

[VN] It's known as the most dangerous part of the city.

人們都認為那是市內最危險的地段。

She is best known for her work on the human brain.

她在對人腦的研究方面最為知名。

[VN to inf] He's known to be an outstanding physicist.

他被公認為傑出的物理學家。

命名 give name

6

[VN] ~ sb/sth as sth

[usually passive] 將…稱為；把…叫做

to give sb/sth a particular name or title

The drug is commonly known as Ecstasy.

這種葯通常稱作搖頭丸。

Peter Wilson, also known as ‘the Tiger’.

彼得∙威爾遜，也稱“老虎”。

認出 recognize

7

[VN] 能認出；能辨認出

to be able to recognize sb/sth

I couldn't see who was speaking, but I knew the voice.

我看不到誰在講話，但我能辨認出聲音。

She knows a bargain when she sees one.

她一看就知道有沒有便宜可撿。

區分 distinguish

8

[VN] ~ sb/sth from sb/sth

能區分；能分辨

to be able to distinguish one person or thing from another

同義詞： differentiate

I hope we have taught our children to know right from wrong.

我希望我們教給了孩子分辨是非的能力。

技能；語言 skill/language

9

學會；掌握

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

[VN] Do you know any Japanese?

你會日語嗎？

[V wh-] Do you know how to use spreadsheets?

你知道電子數據表的使用方法嗎？

經歷 experience

10

(only used in the perfect tenses 僅用於完成時) 看到過；聽到過；經歷過

to have seen, heard or experienced sth

[VN inf , VN to inf] I've never known it (to) snow in July before.

我以前從未見到過七月份下雪。

[VN to inf] He has been known to spend all morning in the bathroom.

聽說他整個上午都待在盥洗室里。

11

[VN] 親身體驗；親身經歷

to have personal experience of sth

He has known both poverty and wealth.

他貧富生活都親身經歷過。

She may be successful now, but she has known what it is like to be poor.

她現在可能成功了，但她嘗過貧窮的滋味。

習語

before you know where you are

瞬息之間；轉眼間；一下子

very quickly or suddenly

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

還沒等我們弄清怎麼回事，計程車就一陣風似地把我們帶走了。

be not to know

無從知道，並不知道（做錯了事）

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.’

“對不起，你睡覺時打電話打擾你了。”“別在意——你不是故意的嘛。”

for all you, I, they, etc. know

(informal) （強調不知道對自己無關緊要的事）不知道，說不定，亦未可知

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.

她說不定已經死了。

God/goodness/Heaven knows

1

（強調不知道）誰知道，天曉得

used to emphasize that you do not know sth

God knows what else they might find.

誰知道他們還可能找到什麼。

‘Where are they?’ ‘Goodness knows.’

“他們在哪兒？”“天曉得。”

【幫助說明】 Some people may find the use of God knows offensive. 有人可能認為用God knows含冒犯意。

2

（強調所言屬實）老天作證，確實，的確

used to emphasize the truth of what you are saying

She ought to pass the exam─goodness knows she's been working hard enough.

她應該考合格——她可真夠努力了。

I don't know how, why, etc.…

(informal) （批評某人的行為）真想不到，真不知道

used to criticize sb's behaviour

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

真想不到你怎麼會說出這種話來。

I know

1

（表示同意或同情）我理解，我有同感，我知道

used to agree with sb or to show sympathy

‘What a ridiculous situation!’ ‘I know.’

“這境況真荒唐！”“的確是。”

2

（引出新的想法或建議）我有個主意（或辦法、建議）

used to introduce a new idea or suggestion

I know, let's see what's on at the theatre.

我有主意了，咱們看看劇院在上演什麼。

know sth as well as I do

（用以批評）其實完全明白，哪會不知道，知道得很清楚

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.

其實你完全明白你是在故意胡攪蠻纏。

know sb/sth backwards

(informal, especially BrE) 對…了如指掌（或倒背如流）；把…背得滾瓜爛熟

to know sb/sth extremely well

She must know the play backwards by now.

她現在對這個劇本肯定是倒背如流。

know best

最懂得，最知道，比誰都明白（該怎麼做，等等）

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

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

醫生叫你卧床休息，她最清楚你該怎麼做。

know better (than that/than to do sth)

明白事理（而不至於）；不至於糊塗到

to be sensible enough not to do sth

He knows better than to judge by appearances.

他明白得很，絕不會憑表面現象來判斷。

know sb by sight

與某人面熟

to recognize sb without knowing them well

know different/otherwise

(informal) 所知道的不是那麼回事；所掌握的情況大不一樣（或大相徑庭）

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.

他說他並不在乎批評家的評論，可我知道不是那麼回事。

know full well

非常清楚；不可否認；不可忽視

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

He knew full well what she thought of it.

他非常清楚她對此事的看法。

know sb/sth inside out

know sb/sth like the back of your hand

(informal) 對…極為熟悉（或了如指掌）

to be very familiar with sth

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

我在這兒長大的，我對這地方再熟悉不過了。

know your own mind

知道自己想做什麼；有主見

to have very firm ideas about what you want to do

know your stuff

(informal) 精通業務；對工作很內行

to know a lot about a particular subject or job

know your way around

熟悉周圍情況（或課題等）

to be familiar with a place, subject, etc.

know what you're talking about

(informal) 親身經歷過；作經驗之談

to have knowledge about sth from your own experience

know which side your bread is buttered

(informal) 知道自己的利益所在

to know where you can get an advantage for yourself

let it be known/make it known that…

(formal) （尤指通過他人傳達而）使人知曉，讓人知道

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.

總統已經公開表示他不打算再次參加競選。

let sb know

讓某人知道；告訴（或通知）某人

to tell sb about sth

Let me know how I can help.

我能幫什麼忙，只管說。

make yourself known to sb

向某人作自我介紹

to introduce yourself to sb

I made myself known to the hotel manager.

我向旅館老闆作了自我介紹。

not know any better

（因缺乏教養而）表現不好；因無人指教而舉止不良

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

not know your arse from your elbow

(BrE, taboo, slang) 愚蠢之至；屁都不懂

to be very stupid or completely lacking in skill

not know beans about sth

(NAmE, informal) 完全不懂行；對…一竅不通

to know nothing about a subject

not know the first thing about sb/sth

對…一無所知；對…一竅不通

to know nothing at all about sb/sth

not know sb from Adam

(informal) 根本不認識某人；與某人素不相識

to not know at all who sb is

not know what hit you

(informal) 因吃驚而不知所措；驚呆了

to be so surprised by sth that you do not know how to react

not know where to look

(informal) 尷尬得不知如何是好；狼狽不堪；感到很難堪

to feel great embarrassment and not know how to react

not know whether you're coming or going

(informal) （激動得）不知如何是好；糊裡糊塗；不知所措

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

not know you are born

(BrE, informal) 身在福中不知福

to have an easy life without realizing how easy it is

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

你們沒孩子，真是身在福中不知福啊。

there's no knowing

難以預料；無從知道；沒法說

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

There's no knowing how he'll react.

很難預料他會有什麼樣的反應。

what does… know?

（某人）知道什麼，懂什麼

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

What does he know about football, anyway?

不管怎麼說，他懂什麼足球？

what do you know?

(informal) （表示驚奇）你看怪不怪，真沒想到

used to express surprise

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

唷，真想不到！你看誰來啦！

you know

1

（說話人考慮接著說什麼時用）

used when you are thinking of what to say next

Well, you know, it's difficult to explain.

唉，你知道，這很難解釋。

2

（表示對方知道或了解所言）你知道的

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.

你猜我剛才看見誰了，瑪吉！你難道不知道——吉姆的妻子呀。

You know that restaurant round the corner? It's closed down.

拐角那家餐館，你知道吧？已經倒閉了。

3

（加強語氣）你要知道

used to emphasize sth that you are saying

I'm not stupid, you know.

你要知道，我不是傻子。

you know something/what?

(informal) （引出令人感興趣或吃驚的看法、消息等）要我告訴你嗎，你聽說了嗎

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

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

要我告訴你嗎？聖誕節我從未真正快樂過。

you know who/what

(informal) （不說出名稱）你知道是誰 / 什麼

used to refer to sb/sth without mentioning a name

you never know

(informal) （尤指可能會發生好事）很難說，很難預料

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

have/know all the answers

(informal, often disapproving) （自以為）全懂，什麼都精通

to be confident that you know sth, especially when you actually do not

He thinks he knows all the answers.

他自以為什麼都知道。

have seen/known better days

(humorous) 窮困潦倒；昔盛今衰；曾輝煌過

to be in poor condition

Our car has seen better days!

我們的汽車曾輝煌一時！

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

(saying) 熟悉的魔鬼比不熟悉的魔鬼好；不要嫌熟悉的環境不好，換個不熟悉的環境可能更糟

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

as far as I know

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

就我所知；盡我所記得的；依我看

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.

就我們所知，沒有什麼要擔心的。

As far as I can see, you've done nothing wrong.

依我看，你沒有做錯任何事。

She lived in Chicago, as far as I can remember.

據我所記得的，她過去住在芝加哥。

old enough to know better

已長大，該懂事了

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

have/know sth off pat

NAmE have/know sth down pat

了如指掌；滾瓜爛熟

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.

所有的答案他都胸有成竹。

show sb/know/learn the ropes

(informal) 向某人演示 / 知道 / 學會如何做某事

to show sb/know/learn how a particular job should be done

know/tell sb a thing or two (about sb/sth)

(informal) 了解 / 透露有用的（或有趣的、意外的）信息；有所了解 / 披露；見多識廣

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!

她結過五次婚，所以對男人有所了解。

noun

習語

in the know

(informal) 知情；熟悉內幕；掌握內情

having more information about sth than most people

Somebody in the know told me he's going to resign.

有知情者告訴我他要辭職了。

● 1VERB 知道；知悉；了解

● If you know a fact, a piece of information, or an answer, you have it correctly in your mind.I don't know the name of the place...我不知道那個地方的名字。

● 2VERB 熟識；認識

● If you know someone, you are familiar with them because you have met them and talked to them before.Gifford was a friend. I'd known him for nine years...吉福德是我的一位朋友。我和他認識9年了。

● 3VERB 聽說過；略有耳聞

● If you say that you know of something, you mean that you have heard about it but you do not necessarily have a lot of information about it.We know of the incident but have no further details...我們聽說過這件事，但對詳情不是很清楚。

● 4VERB 了解，掌握（某一學科）

● If you know about a subject, you have studied it or taken an interest in it, and understand part or all of it.Hire someone with experience, someone who knows about real estate...雇傭有經驗、了解房地產業的人。

● 5VERB 學會，掌握（語言）

● If you know a language, you have learned it and can understand it.It helps to know French and Creole if you want to understand some of the lyrics...如果你想讀懂一些抒情詩，學點法語和克里奧爾語是有幫助的。

● 6VERB 熟悉；了解

● If you know something such as a place, a work of art, or an idea, you have visited it, seen it, read it, or heard about it, and so you are familiar with it.No matter how well you know Paris, it is easy to get lost...不管你對巴黎多麼熟悉，也很容易迷路。

● 7VERB 會；能

● If you know how to do something, you have the necessary skills and knowledge to do it.The health authorities now know how to deal with the disease...衛生部門現在知道如何對付這種病了。

● 8VERB 意識到；覺察到

● You can say that someone knows that something is happening when they become aware of it.Then I saw a gun under the hall table so I knew that something was wrong...後來我看到大廳的桌子下有一把槍，我就意識到有些不對勁兒。

● 9VERB 認出；辨認出

● If you know something or someone, you recognize them when you see them or hear them.Would she know you if she saw you on the street?...如果她在大街上看到你，能認出你嗎？

● 10VERB 稱為；叫做If someone or something is known as a particular name, they are called by that name.The disease is more commonly known as Mad Cow Disease...這種疾病更通俗的名稱是瘋牛病。

● 11VERB 認為…是；把…看作是

● If you know someone or something as a person or thing that has particular qualities, you consider that they have those qualities.Lots of people know her as a very kind woman...很多人認為她是個非常善良的女人。

● 12VERB （因某工作或角色）認識

● If you know someone as a person with a particular job or role, you are familiar with them in that job or role, rather than in any other.Most of us know her as the woman who used to present the television news...我們大多數人認識她是因為她曾主持過電視新聞節目。

● 13

● See also: knowing; known

● 14PHRASE 現行的；我們熟悉的；我們熟知的

● If you talk about a thing or system as we know it, you are referring to the form in which it exists now and which is familiar to most people.He planned to end the welfare system as we know it.他計劃終止現行的福利制度。

● 15PHRASE （花時間）了解

● If you get to know someone, you find out what they are like by spending time with them.The new neighbours were getting to know each other...新鄰居之間正在互相了解。

● 16PHRASE 誰知道；天曉得

● People use expressions such as goodness knows ,Heaven knows, and God knows when they do not know something and want to suggest that nobody could possibly know it.'Who's he?' — 'God knows.'“他是誰？”——“天曉得。”

● 17CONVENTION （表示同意）我理解，我有同感，我知道

● You say 'I know' to show that you agree with what has just been said.'This country is so awful.' — 'I know, I know.'“這個國家太糟糕了。”——“的確是，的確是。”

● 18CONVENTION （表示接受）我知道

● You say 'I know' to show that you accept that something is true, but think that it is not very important or relevant.'There are trains straight from Cambridge.' — 'I know, but it's no quicker.'“有直接從劍橋開出的列車。”——“我知道，但也不快。”

● 19PHRASE （表示同情和理解）我理解，我知道

● You use 'I know' to express sympathy and understanding towards someone.I'm sorry, George. I know how you feel...我很遺憾，喬治。我理解你的感受。

● 20PHRASE 不知道，不認為（表示不完全同意或不認為是真的）

● You can use I don't know to indicate that you do not completely agree with something or do not really think that it is true.'He should quite simply resign.' — 'I don't know about that.'“他就該辭職。”——“我不知道。”

● 21PHRASE 我不知道你（們）怎麼想（表示將表達自己想法並想知道他人的看法）

● You can say 'I don't know about you' to indicate that you are going to give your own opinion about something and you want to find out if someone else feels the same.I don't know about the rest of you, but I'm hungry...我不知道你們怎麼樣，但我是餓了。

● 22PHRASE （表示批評某人的行為）真想不到，真不知道

● You use I don't know in expressions which indicate criticism of someone's behaviour. For example, if you say that you do not know how someone can do something, you mean that you cannot understand or accept them doing it.I don't know how he could do this to his own daughter...真想不到他竟對自己的女兒這樣。

● 23PHRASE 我要是知道就好了；我根本不知道

● People sometimes use expressions such as I'm blessed if I know or damned if I know to emphasize the fact that they do not know something.'What was that all about?' — 'Damned if I know.'“那都是關於什麼的？”——“我要知道就好了。”

● 24PHRASE 知情；（尤指）熟悉內幕，掌握內情

● If you are in the know about something, especially something that is not known about or understood by many people, you have information about it.It was gratifying to be in the know about important people...了解重要人物的一些內幕真令人高興。

● 25CONVENTION （表示所說的話對方理解）你是知道的，你知道我的意思

● You can use expressions such as you know what I mean and if you know what I mean to suggest that the person listening to you understands what you are trying to say, and so you do not have to explain any more.None of us stayed long. I mean, the atmosphere wasn't — well, you know what I mean...我們都沒呆太久。我的意思是，氣氛並不是——唔，你知道我的意思。

● 26CONVENTION （指可能會發生好事）很難說，很難預料

● You say 'You never know' or 'One never knows' to indicate that it is not definite or certain what will happen in the future, and to suggest that there is some hope that things will turn out well.You never know, I might get lucky...很難說，我也許會交好運呢。

● 27CONVENTION 據我所知沒有

● You say 'Not that I know of' when someone has asked you whether or not something is true and you think the answer is 'no' but you cannot be sure because you do not know all the facts.'Is he married?' — 'Not that I know of.'“他結婚了嗎？”——“據我所知沒有。”

● 28PHRASE 我怎麼知道；我不知道

● You can say 'How was I to know?', or in British English 'I wasn't to know', to mean that you cannot be blamed or criticized for something you did, because you did not have enough information to realize that it was wrong.How was I to know you'd return so suddenly?...我怎麼知道你會這麼突然就回來?

● 29PHRASE （某人）知道什麼，懂什麼（表示其沒有資格評論）

● You can use expressions such as What does she know? and What do they know? when you think that someone has no right to comment on a situation because they do not understand it.Don't listen to him, what does he know?...別聽他的，他知道什麼？

● 30EXCLAM （表示驚訝）你看怪不怪，真沒想到

● People sometimes say 'What do you know!' when they are very surprised about something.Well, what do you know!哎呀，真沒想到！

● 31CONVENTION （加強語氣或引起注意）你要知道

● You use you know to emphasize or to draw attention to what you are saying.The conditions in there are awful, you know...你要知道，那裡的條件很艱苦。

● 32CONVENTION （表示不確定要說的話或考慮接著說什麼）你知道

● People use you know when they are uncertain about what they are saying or what they are going to say next.He's generous and, you know, very nice, very polite...他很大方而且，你知道，很友善，很有禮貌。

● 33CONVENTION （表示進一步解釋）你是知道的，你難道不知道

● You use you know when you are trying to explain more clearly what you mean, by referring to something that the person you are talking to knows about.Wear the white dress, you know, the one with all the black embroidery.穿那件白裙，你知道的，上面有黑色刺繡的那件。

● 34PHRASE （加強語氣）你不知道，你都想不到

● You can say 'You don't know' in order to emphasize how strongly you feel about the remark you are going to make.You don't know how good it is to speak to somebody from home.你不知道和家鄉來的人說說話感覺有多好。

● 35to know something backwards →see: backwards 

know about 了解 ; 知道…的情況 ; 知道有關於 ; 知道

know better 明事理 ; 有頭腦 ; 有不止如此的了解 ; 大街上踢足球

Know Ignorance 知其不知

Know little 知道得很少 ; 知道的少 ; 知道很少 ; 知之不多

Know More 知道更多 ; 懂得的越多 ; 知識創新 ; 比較深入

know Service 知名服務

Know your 懂你 ; 認識你 ; 對不起 ; 抱歉

Know Limitations 了解的限制 ; 知道的局限性 ; 知道限制

know none 知道沒有 ; 都不認識 ; 知道無

I do not know every one of you.

我不認識你們中的每一個人。

I do not know why you like him.

我不知道，你為什麼喜歡他。

How do I know what I should do, what not to do?

我怎麼知道我應該做什麼，不應該做什麼呢

1.know的基本意思是“知道”“認識”“聽說”,指直接了解某事物，也可表示“領會，懂得”,指通過體驗或傳授而獲得知識。

2.know可用作不及物動詞，也可用作及物動詞。用作及物動詞作“知道，懂得”解時，可接表示事物的名詞、代詞、帶疑問詞的動詞不定式、that或疑問詞引導的從句作賓語，也可接以“(to be/as+) n./adj./prep. -phrase. ”或動詞不定式充當補足語的複合賓語。作“認識，了解”解時，可接表示人或物的名詞作賓語。know可用於被動結構。know接to be作賓語補足語時, to be常可省略，但當to be表示的時間先於know表示的時間時，須用不定式的完成式，且不可省略。

3.在對話回答語中，如know的賓語表示的是整個事實(如that-clause),則賓語可省略; 如know的賓語是一個具體事物，則通常以it代替之。

4.know是表示思想狀態的動詞，指思維活動的結果，通常不用於進行體。