adj.(形容词)

1. 肯定的，一定会的
2. 确定的
3. 某，某种，某些
4. 确信的
5. 确凿的，无疑的，可靠的，有把握的
6. 某种程度的
7. 确实的
8. 可靠的

pron.(代词)

1. 某些，某几个，某个

adv.(副词)

1. 一定，确实地

adj.(形容词)

1. [P]无疑的,肯定的 without any doubt; sure
2. [A]某,某些 one or some that can be named

Adjective:

1. definite but not specified or identified;

   "set aside a certain sum each week"
   "to a certain degree"
   "certain breeds do not make good pets"
   "certain members have not paid their dues"
   "a certain popular teacher"
   "a certain Mrs. Jones"
   

2. having or feeling no doubt or uncertainty; confident and assured;

   "felt certain of success"
   "was sure (or certain) she had seen it"
   "was very sure in his beliefs"
   "sure of her friends"
   

3. established beyond doubt or question; definitely known;

   "what is certain is that every effect must have a cause"
   "it is certain that they were on the bus"
   "his fate is certain"
   "the date for the invasion is certain"
   

4. certain to occur; destined or inevitable;

   "he was certain to fail"
   "his fate is certain"
   "In this life nothing is certain but death and taxes"
   "he faced certain death"
   "sudden but sure regret"
   "he is sure to win"
   

5. established irrevocably;

   "his fate is sealed"
   

6. reliable in operation or effect;

   "a quick and certain remedy"
   "a sure way to distinguish the two"
   "wood dust is a sure sign of termites"
   

7. exercising or taking care great enough to bring assurance;

   "be certain to disconnect the iron when you are through"
   "be sure to lock the doors"
   

肯定（BEING SURE）

1.肯定的;有把握的;毫无疑问的
If you arecertain about something, you firmly believe it is true and have no doubt about it. If you are notcertain about something, you do not have definite knowledge about it.

e.g. She's absolutelycertain she's going to make it in the world...
她坚信自己会出人头地。
e.g. We are notcertain whether the appendix had already burst or not...
我们不敢肯定阑尾是否已经破裂。

2.必然的;必定的;肯定的
If you say that something iscertain to happen, you mean that it will definitely happen.

e.g. However, the scheme iscertain to meet opposition from fishermen's leaders...
然而，这项计划一定会遭到渔民领袖的反对。
e.g. It's notcertain they'll accept the Front's candidate if he wins...
即便来自阵线的候选人获胜，他们能否接受他还说不准。

3.确凿的；无疑的
If you say that something iscertain, you firmly believe that it is true, or have definite knowledge about it.

e.g. One thing iscertain, both have the utmost respect for each other...
有一点可以肯定，那就是双方都非常尊重对方。
e.g. It iscertain that Rodney arrived the previous day.
罗德尼肯定是头天到的。

4.确实的;肯定的
If you havecertain knowledge, you know that a particular thing is true.

e.g. He had been there four times to mycertain knowledge.
我确定他去过那儿4次。

5.确切地;无疑地
If you know somethingfor certain, you have no doubt at all about it.

e.g. She couldn't know what time he'd go, or even forcertain that he'd go at all...
她不知道他何时走，就连他到底走不走都说不准。
e.g. Hill had to find out forcertain.
希尔得弄个清楚。

6.确保；保证
If youmake certain that something is the way you want or expect it to be, you take action to ensure that it is.

e.g. Firstly, they must makecertain that their pension needs are adequately catered for...
首先，他们得确保他们能获得足够的养老金。
e.g. To make extracertain, a police helicopter kept watch from the skies.
为确保万无一失，一架警用直升机一直在空中警戒。

表示数量（REFERRING AND INDICATING AMOUNT）

1.某个;特定的
You usecertain to indicate that you are referring to one particular thing, person, or group, although you are not saying exactly which it is.

e.g. There will becertain people who'll say 'I told you so!'...
一定有人会说：“我怎么跟你说来着！”
e.g. You owe acertain person a sum of money...
你欠某人一笔钱。

2.某些;一些
When you refer tocertain of a group of people or things, you are referring to some particular members of that group.

certain

e.g. They'll have to give up completely oncertain of their studies.
他们将不得不彻底放弃某些研究。

3.(用于人名前，表示不认识或了解很少)某个
You can usea certain before the name of a person in order to indicate that you do not know the person or anything else about them.

certain的反义词

e.g. She managed to arrange for them to be hidden in the house of acertain Father Boduen.
她设法安排他们藏在一个叫博迪恩的神父家里。

4.(品质、特点等)一定程度上的，有点儿
You usea certain to indicate that something such as a quality or condition exists, and often to suggest that it is not great in amount or degree.

e.g. That was the very reason why he felt acertain bitterness...
那就是为什么他感到有些痛苦。
e.g. There is acertain impatience among some of the soldiers...
有些士兵有点儿不耐烦。

1.

1. 肯定：股票市场最难搵到投资对象日子,就系大家对前景好肯定(certain)之时;反之,机会处处往往系股市进入不稳定期(uncertain times). 今年1月人人话内地A股出现泡沫,就系另一投资内地股票时机,反而依家人人改变睇法,认同唔系泡沫,便要小心D.

2. 确定：中国证监会前副主席史美伦就曾经指出,上市公司质量问题、高管人员圈钱、大股东占用公司资金等等行为是很严重的问题,证监会现在很重视这个问题. 对于这些行为的执法也非常重要,因为监管的含义就是制定法律和执行法律,为市场提供比较清楚(clear)确定(certain)的法律,而不能朝令夕改.

用作定语～+ n.

1. A certain person called on me yesterday.
   昨天有人来找过我。
2. A certain Mr. Brown telephoned while you were out.
   你出去的时候,有个叫布朗的先生来过电话。
3. The terrorists will only release their hostages on certain conditions.
   恐怖分子只有在某些条件下才肯释放人质。
4. There are certain forms that must be followed in diplomatic circles.
   在外交界有一些礼节是必须遵守的。
5. I am prepared to make certain concessions.
   我准备做某些让步。
6. There was a certain hesitation in her manner.
   她的态度有些犹豫不决。
7. If you want to be slim, you should try to lose a certain amount of weight every week.
   如果想变得苗条些的话,你应该想方设法每周减少点体重。
8. She has certain definite beauties, such as her eyes.
   她确有几分姿色,比如说她的眼睛。
9. There is no certain cure for this disease.
   这种病没有特效药。
10. They face certain death unless they can be rescued today.
    他们除非今天获救,否则必死无疑。
11. They went to a certain place.
    他们到某一个地方去了。
12. The club meets on certain days every month.
    俱乐部成员每月于某些天聚一次。

用作表语S+be+～

1. His ear for music was certain.
   他对音乐的鉴赏力毋庸置疑。
2. That we should stay together was certain.
   我们应该呆在一起这是肯定的。
3. It is more or less certain.
   这有几分确定。
4. After the Boston Tea Party, war with England seemed certain.
   波士顿倾茶事件以后,与英国交战似乎是不可避免的。

S+be+～+to- v

1. We are certain to win the game.
   我们一定能打胜这场比赛。
2. He is certain to come.
   他一定会来。
3. The people of the afflicted areas are certain to need our help.
   灾区人民一定需要我们的帮助。
4. Spring is certain to follow winter.
   冬去春来。
5. The duties before you are certain to be heavy.
   摆在你面前的责任重大。
6. We are certain to be victorious.
   我们定会胜利。
7. The thief is certain to be caught in time.
   小偷迟早会被抓到的。
8. You are pretty certain to be seen by someone who knows you.
   你一定被认识你的人见到过。

S+be+～+(that/)wh-clause

1. I'm certain that he had seen me.
   我敢肯定他看见我了。
2. We are certain that he will get over his illness.
   我们相信他一定会战胜病魔的。
3. He is certain that this TV set will operate on batteries.
   他肯定这个电视机可以用电池。
4. Be certain you catch your train on time.
   务必准时赶上火车。
5. I'm certain I put the book on the table.
   我肯定是把书放在桌子上。
6. I'm certain she saw me yesterday.
   我确信她昨天看到了我。
7. I was certain I'd found you here if you were still in existence.
   我确信如果你还活着的话,我会在这儿找到你。
8. I am not certain who he is.
   我无法确切说出他是谁。
9. I'm not certain when we start off.
   我拿不准我们何时动身。
10. I'm not certain where this ought to be put.
    我不能确定这东西该放在什么地方。

It is/was+～+to- v

1. It is certain to rain.
   (我们相信)天一定会下雨。

It is/was+～+(that/)wh-clause

1. It is now certain that he won the election.
   他在本次选举中获胜现在确定无疑。
2. It seems certain that our team will win the prize.
   看来我们队有得奖的把握。
3. It is certain he will come to the discussion.
   他肯定会来参加讨论。
4. It is not yet certain who will succeed him.
   谁来接他的班还未确定。
5. It is not certain when it will take place.
   不能确定这事什么时候会发生。

certain of

一群中的某些 some particular members of a group of people

for certain

无疑地,确定地 without doubt

make certain

弄清楚 inquire in order to be sure about sth

make certain of

采取行动以便确有把握做其他事 do sth in order to be sure of (doing) sth else

了解海关手续

A：You've traveled abroad a lot, Jim, so would you like to tell me something about clearing customs.
吉姆，你经常出国旅游，能向我介绍一下关于通关的情况吗？

certain的意思

B：When you arrive in a country, you clear customs. A lot of countries have two channels: the green channel and the red channel. Some countries, like India, have three channels: the white channel, the green channel and the red channel.
到达一个国家时要通关。许多国家的海关有两种通道：绿色通道和红色通道。还有些国家如印度有三种通道：白色通道、绿色通道和红色通道。

certain的近义词

A：Then what are the differences between the green channel and red channel?
那么绿色通道和红色通道之间有什么区别呢？

B：If you have more than the duty-free allowances or prohibited goods, you go through the red channel and declare them to a customs officer. If you otherwise have nothing to declare, you go straight through the green channel unless you are asked to stop by an officer. 如果你携带的东西超出免税的范围或属于禁带物品，你
就得从红色通道通过并向海关官员申报物品。如果你没有需要申报的物品而海关官员又没有阻拦你，你就可以直接通过绿色通道了。

A：I see.I'm told that we'll have to state the purpose of going to acertain country, is it true?
我明白了。我听说去一个国家时需要陈述旅行的目的，是吗？

B：That's right. People go aboard for different purposes: some for pleasure, some on vacation, some on business, and some for other purposes.
是的。人们出国都各有目的：有的为了消遣，有的出去度假，有的是因公出差，有的是为了其他目的。

certain的意思

A：I'm going to New Zealand for sightseeing. What should I say if they ask about my purpose?
我要去新西兰观光，如果他们问我旅行的目的我该怎么说呢？

certain是什么意思

B：Just saying "sightseeing" is OK.
说"观光"就行了。

It's certain that every effect must have a cause.

无疑，每个结果必定有其原因。

I can tell you for certain that I am always honest.

我可以肯定地告诉你, 我一向是老实的。

certain things are still open to discussion.

有些事还需要商量。

A certain man will visit you tomorrow.

明天某人将探访你。

For certain reasons I will be unable to attend the meeting.

因为某种原因，我不能出席这次会议。

A certain Mr Brown telephoned while you were out.

你出去的时候

To a certain extent, I'm in favor of your project.

从某种程度上说,我赞成你的方案。

There was a certain coldness in her attitude towards me.

她对我的态度有点儿冷淡。

certain of those present had had too much to drink.

有些出席的人喝得太多了。

Are you absolutely certain about this?

你对这事绝对确信无疑吗？

I'm not certain who was there.

我无法确定谁当时在场。

To my certain knowledge he was somewhere else at the time (= I am sure about it) .

我敢肯定他当时在别处。

For certain personal reasons I shall not be able to attend.

由于某种个人原因，我将不能出席。

certain people might disagree with this.

某些人对这事可能不会赞同。

They refused to release their hostages unless certain conditions were met.

除非某些条件得到满足，否则他们不会释放人质。

It was a certain Dr Davis who performed the operation.

是一位叫戴维斯的医生做的手术。

That's true, to a certain extent .

在一定程度上的确如此。

If you want to be certain of getting a ticket, book now.

要想有把握买到票，现在就得预订。

She wasn't certain (that) he had seen her.

她不敢肯定他见过她。

The climbers face certain death if the rescue today is unsuccessful.

救援行动如果今天不能成功，登山队员必死无疑。

It is certain that they will agree'/They are certain to agree.

他们肯定会同意。

She looks certain to win an Oscar.

看来奥斯卡金像奖非她莫属。

You owe a certain person a sum of money...

你欠某人一笔钱。

They'll have to give up completely on certain of their studies.

他们将不得不彻底放弃某些研究。

She managed to arrange for them to be hidden in the house of a certain Father Boduen.

她设法安排他们藏在一个叫博迪恩的神父家里。

That was the very reason why he felt a certain bitterness...

那就是为什么他感到有些痛苦。

There is a certain impatience among some of the soldiers...

有些士兵有点儿不耐烦。

There will be certain people who'll say 'I told you so!'...

一定有人会说：“我怎么跟你说来着！”

It is certain that Rodney arrived the previous day.

罗德尼肯定是头天到的。

He had been there four times to my certain knowledge.

我确定他去过那儿4次。

She couldn't know what time he'd go, or even for certain that he'd go at all...

她不知道他何时走，就连他到底走不走都说不准。

Hill had to find out for certain.

希尔得弄个清楚。

Firstly, they must make certain that their pension needs are adequately catered for...

首先，他们得确保他们能获得足够的养老金。

To make extra certain, a police helicopter kept watch from the skies.

为确保万无一失，一架警用直升机一直在空中警戒。

One thing is certain, both have the utmost respect for each other...

有一点可以肯定，那就是双方都非常尊重对方。

We are not certain whether the appendix had already burst or not...

我们不敢肯定阑尾是否已经破裂。

However, the scheme is certain to meet opposition from fishermen's leaders...

然而，这项计划一定会遭到渔民领袖的反对。

It's not certain they'll accept the Front's candidate if he wins...

即便来自阵线的候选人获胜，他们能否接受他还说不准。

She's absolutely certain she's going to make it in the world...

她坚信自己会出人头地。

adj.(形容词)

1. certain的基本意思是“确信无疑的”或“毋庸置疑的”,即“肯定的,确信的”,在句中常用作表语。其后可接动词不定式,表示“相信(某人)会做某事”。
2. certain的另一个意思是“某一,某种”,在句中只能用作定语,常与不定冠词a连用,修饰单、复数名词或抽象名词,表示“因故而未加具体说明的人、物、地点、时间等”。
3. be certain用于祈使句,意思是“一定要设法办到…”。
4. It is/was certain that...表示说话人的看法，其中certain 不可用certainly或sure代替。在否定句中,多接以疑问词whether,what,how等引导的从句。
5. certain前不能用very或extremely修饰,如需强调可用absolutely或completely等词修饰。
6. 短语动词make certain的意思是“弄确实,弄清楚”,其后可接of引起的动名词短语或that从句。

1. certain表示“某个，某些”时，作形容词或代词，如a certain friend of his或certain of his；
2. certain作形容词表示“一些”时，常修饰抽象名词，如a certain hesitation，a certain coldness；
3. 区别certain和sure：两者后面都可跟of，不定式或that从句。certain比sure语气来的更重。It is certain that...比It is sure that...更为普遍。

   I am certain/sure of his honesty.
   I am certain/sure to see him tomorrow.

4. certian of和certain to do表示不同的意思。

   He is certain to come tomorrow.
   他明天一定来。

   He is certain of coming tomorrow.
   他相信他明天一定来。

5. certain作形容词指“确定的”时，后面接的介词about可省略。

   I am not certain (about) where he lives.
   我不太确定他住在哪里。

6. for certain表示“肯定的，无疑的”，属于固定词组。

adj.(形容词)

(a) certain, some

这两者都有“某一,某些”的意思。

1.some侧重于表示对某人或某物一无所知; 而a certain则多用于对某人或某物知而不详或知而不言。

2.some可与or, or other, or another等笼统的词连用; a certain则可与姓氏连用。

3.some经常含有不在乎、不感兴趣、轻蔑,甚至不赞成、不喜欢的意思; (a) certain则一般不带或少带感情色彩。

4.a certain还可和抽象名词连用,暗示说话者该用什么词来表达心里的想法拿不太准,在许多情况下,那个选出来的词有点不达意、不寻常,用a certain有助于削弱该词的奇特程度。

be certain to-v, be certain of v-ing

be certain to- v 意思是“肯定会做某事”,指将要发生某事; be certain of v -ing意思是“觉得肯定要做某事”,指某人的自我看法。

He is certain to succeed.

他一定会成功。(是别人对他的估计)

He is certain of succeeding.

他有把握成功。(是他对自己的信心)

certain, positive, sure

这三个词都表示“肯定的”“确信的”,但所表示的程度有所不同。

1.certain强调有充分的根据,或自己直接所知道的事情的真相。

2.sure强调主观上怀有强烈的愿望或心里没有疑虑。例如:

I'm sure we'll start on time.我想我们能及时出发。

3.positive比sure和certain更加肯定,强调对自己所说的话或所下的结论的正确性深信不疑,常常表现出过分的自信或主观武断。例如:

I am positive that I saw this man before.我肯定我以前见过此人。

As I can't be certain,I won't be positive.在我不肯定时,我不想武断。

4.名词性从句作主语时,一般不用sure,而用certain。

I am certain,I am sure

I am certain比I am sure语气强,前者指“不容置疑的”“确实已成为事实的”,后者指很强的“愿望”“深信”，但是I am not certain与I am not sure意思相同。例如:

I am certain that he has left—I saw him go out.

我肯定他已走了——我看见他出去了。

I am sure that they'll win the game this time.

我肯定这次比赛他们一定赢。

我不能确定她是否过得幸福。

I am not certain if she is happy.

I am not sure if she is happy.

sure，certain，definite，positive

这些形容词均含“无疑的，确信的”之意。

sure侧重主观上对某事确信无疑。

certain与sure同义，但语气比sure强，着重指有确切理由或不容置疑的证据所支持的确信。

definite指已毫无怀疑的余地。

positive语气强烈，指对自己的看法或作的结论的正确性有不可动摇的信念。

• ☆ 1300年左右进入英语，直接源自古法语的certain；最初源自拉丁语的certus，意为确定的。