1. P 无疑的，确信的，有把握的　 not doubting or seeming to doubt what one believes, knows, etc. confident that one is right
2. 肯定要做某事的，一定做某事的　 definitely going to do sth; certain to do sth

　～ employee　可靠的雇员
　～ place　稳妥的地方
　～ remedy for headache　治头痛的良药
　～ sign　无疑的征兆
　～ step　确确实实的一步
　～ way　可靠的方法
　～ to pass the exam　考试一定会及格
　be ～　确信
　feel ～　确信
　make ～ of　尽力做到，将…弄明白，保证
　make ～ of the time and place　把时间和地点弄清楚
　～ about　对…确信的
　～ of　确信…的
　～ of oneself　有自信心
　～ of success　确信成功，有把握成功
　～ of support　确信会得到支持
　～ of welcome　一定会受到欢迎

　Dark clouds are a sure sign of rain.　乌云无疑是下雨的征兆。
　He made a sure step out of the mud.　他迈出了挣脱泥潭的确确实实的一步。
　There's only one sure way to do it.　做此事只有一种万全之策。
　He is a sure employee.　他是个可靠的雇员。
　This medicine is a sure remedy for headache.　这是治头痛的良药。
　Going to places is a sure way of getting to know them.　要了解各地，亲自去一趟是最可靠的方法。
　Put it in a sure place.　把它放在稳妥的地方。
　She drew the outline with a sure hand.　她笔力雄健地画出了轮廓。
　Death is sure.　死是不可避免的。
　One is sure—we've won a great victory!　有一点是毋庸置疑的：我们取得了巨大的胜利。
　I shall certainly be present at the meeting, but I am not sure about my wife.　我肯定将出席会议，但是至于我的妻子去不去我就不敢说了。
　Do you feel quite sure of that, Dorian?　多里安，你对那件事确信无疑吗?
　I've never felt sure of success.　我从未有过胜利的把握。
　You're sure of a warm welcome.　你一定会受到热烈欢迎的。
　Can I be sure of a profit if I invest?　我要是投资，就一定能获利吗?
　I am not sure of his address.　我不清楚他的地址。
　There is no penalty for guessing, so if you are not sure of the answer to a question, make the best guess you can.　猜测不扣分，因此如果你对问题的答案不确定，可以猜最佳答案。
　As we have been practising regularly, we are sure of winning the game this time.　我们一直在训练，这次比赛有把握赢。
　You're sure of passing the exam if you work hard.　只要用功，你就一定能及格。
　He is sure to be back soon.　他不久一定会回来。
　Be sure not to be pessimistic about our success.　对我们的成功千万不要悲观。
　Though we suffer from serious natural calamities, we are sure to overcome all difficulties.　我们虽然遭受到了严重的自然灾害，但我们一定能克服一切困难。
　In choosing the seeds for sowing, be sure to reject those that are shrivelled or moulding.　在选取下种的种子时，注意剔除那些皱缩发霉的种子。
　Get up steam, and you will be sure to succeed.　加把劲，你一定会成功的。
　Are you sure you want him for your partner for life?　你肯定要他做你的终身伴侣吗?
　You are sure I won't put on you if I sit beside you?　我坐在你旁边不会打扰你吧?
　Your explanation sounds plausible, but I'm not sure I believe it.　你的解释似乎有道理，但我不会相信。
　Are you sure this roof is completely tight?　你能肯定这个屋顶一点都不漏吗?
　I'm sure (that) I can run much faster than he.　我相信我能比他跑得快得多。
　I was not sure what I ought to do.　我该做什么，我没有把握。
　I'm not sure whether I've met him before.　我不能确定以前是否见到过他。

 ♣ be sure and do sth
　务必做某事　not fail to do sth
　Be sure and tell me all your news.　务必把你所有的情况告诉我。
　Be sure and look!　千万要注意！
　Be sure and give me a ring.　一定要记住给我打电话。
 ♣ for sure
　无疑　without doubt
　I think he lives there but I couldn't say for sure.　我想他是住在那里的，但我不敢肯定。
　The fighting was over for sure.　战斗确实结束了。
　One thing is for sure—public order will have to be established.　有一件事毫无疑问——公共秩序一定要建立起来。
 ♣ make sure (to-v/of sth/v-ing/that...)
1. 把事情弄清楚，核实或查明某事物 find out whether sth is definitely so
　I think the meeting will begin at nine, but you'd better go and make sure.　我想是9点钟开会，但你最好去问清楚。
　I think there's a train at 5 o'clock, but you'd better make sure.　我想5点有一班火车，你最好查个明白。
　I made sure he would be here.　我确信他会来这里。
　He made sure that the rope were tight.　他保证绳子拉紧了。
　Make sure that both doors are locked when you go out.　出去一定要把两扇门都锁好。
　Have you made sure of the time of the flight?　你弄清楚班机的时间了吗?
　Make sure to turn off the light before you leave.　临走前一定要熄灯。
2. 设法确保出现某事物 do sth ensure that sth happens
　We and our friends will make sure of that.　我们和我们的朋友要确保这一点。
 ♣ sure of oneself
　（过分）自信　too confident of one's own abilities, etc.; self-confident
　I hate Joe Lampton, he looked and sounded very sure of himself.　我讨厌乔·兰普顿，他的样子和说话显得非常自信。
　He's never very sure of himself amongst people he doesn't know.　他在不熟悉的人们中间不太自信。
 ♣ sure thing
　是的，当然　yes; of course
　"Do you want to come too?""Sure thing."　“你也想来吗?”“当然了。”
　It's a sure thing that he'll succeed at what he chooses to do because he's so talented.　他要做什么事就一定成功，因为他很有才干。
　Sure thing, I'll be glad to do it for you.　没有问题，我是乐于为你干那事的。
　It's no fun betting on a sure thing.　对确定无疑的事打赌可不是件妙事。
 ♣ to be sure
　无可否认，诚然 I cannot deny (that)，　admittedly
　He is clever, to be sure, but not very hardworking.　他聪明是聪明，但不怎么勤奋。
　This wind is contrary, to be sure, but it is far from a storm.　风当然是逆风，但远不是一场风暴。
　He is young, to be sure, but very experienced.　他固然年轻，但很有经验。

 ♣ be sure of, be sure to
　这两个短语意思不同，前者表示自己的主观看法，是针对自己而言的，而后者是表示对他人〔物〕的估计，对别人〔别物〕而言的。例如：
　
 ♣ I am sure, I am certain
　参见certain条。
 ♣ sure, certain, positive
　参见certain条。

1. 我确信他将会对这起事故负全部责任。
　［误］ I'm sure of that he will take sole responsibility for the accident.
　［正］ I'm sure that he will take sole responsibility for the accident.
　［析］ be sure of的宾语是that从句时，介词 of常省略。
2. 他一定已经从北京回来了。
　［误］ I am sure that he must have come back from Beijing.
　［正］ He must have come back from Beijing.
　［析］ must用来表示讲话人肯定的推测，而 I am sure也是讲话人用来表明自己的肯定的看法的。因此 must和 I am sure用在一起就语义重复，可把 I am sure删去。
3. 这报告肯定是假的。
　［误］ It is sure the report is false.
　［正］ It is certain that the report is false.
　［析］ 用it作形式主语代替后面的名词性从句时，不能用sure，只能用certain.
4. 我不能肯定他已死了。
　［误］ I don't know with sure that he's dead.
　［正］ I don't know for sure that he's dead.
　［析］ for sure表示“肯定地”，是习惯说法，介词for不能用with替代。
5. 请一定锁好房子。
　［误］ Please make sure that the house will be properly locked.
　［正］ Please make sure that the house is properly locked.
　［析］ make sure是动词短语，通常用于祈使句中，表示“肯定”“设法做到”，后面的从句中往往用一般现在时表示将来，强调某一愿望或要求一定要实现。
6. 我对那事很有把握。
　［误］ I am quite sure for it.
　［正］ I am quite sure of it.
　［析］ be sure of〔about〕 意为“对…有把握”“确信”，是句子的主语本身持有的态度，介词不可用for.
7. 只要日本人民坚持斗争，他们一定会赢得胜利。
　［误］ So long as the Japanese people keep on fighting they must win in the end.
　［正］ So long as the Japanese people keep on fighting they are sure to win in the end.
　［析］ must表示“命令”“义务”“责任”，或用以推测未知的事情，上面的句子表示将来肯定会取得某种结果，不可用 must，应用sure.

　sure　还可用作副词，表示“的确，当然”。例如：
　It sure was cold.　确实很冷！
　I said it would happen, and sure enough it did.　我说过要有这样的事发生，果然如此。

　［同义词］ certain, confident, positive, reliable, steady, trustworthy, unfailing
　［反义词］ doubtful, unconvinced, unsteady, unsure, untrue, unworthy
　［词源］　古法语seur<拉丁语securus（安全，肯定）