certain的语法

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

1. 某些，某几个，某个

1. 一定，确实地

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. 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。

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。

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。

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。

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

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。

• Payment of money on a day certain.

  出自：H. J. Stephen

• The fixed and certain oak.

  出自：J. Arlott

• ☆ 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。