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adj (1)確信的，肯定的，有把握的(having no doubt;certain)[無comp][作pred][A (of/about)，A+that，A+wh，A+wh-inf]：I'm not quite～. 我不十分肯定。I am～of his facts/his honesty. 我確信他的資料屬實/他是誠實的。Do you feel quite～of that? 你對那非常有把握嗎? Are you quite～about the telephone number? 你對這個電話號碼有把握嗎? I'm not～about/of his ability to cope with this. 我不敢肯定他有對付此事的能力。Are you～that you have locked the door? 你確信你已經(jīng)鎖門了嗎? I was not～what I ought to do/where she lives. 我不知道我該做什么/她住在哪里。〖同〗confident，assured，convinced，positive，certain;〖反〗unsure，uncertain，doubtful，distrustful;

(2)肯(一)定會(有，得到……)(certain of having，receiving，winning，etc)[作pred][A(of)]：I feel～of success/her support/a profit. 我覺得我肯定會成功/得到她的支持/獲利。You're～of a warm welcome. 你肯定會受到熱烈歡迎的。

(3)肯(一)定會(做某事)(unlikely to fail to do or get)[無comp][作pred][A+to-inf]：He's～to win/refuse. 他肯定會贏/拒絕。It is～to rain. 一定會下雨。There's～to be some somewhere. 什么地方肯定會有一些的。They are～to have eaten everything up. 他們肯定把一切都吃光了。

(4)可靠的，信得過的(reliable or trustworthy)[通常作attrib]：a～friend 一個可靠的朋友;a safe，～method 一種安全可靠的方法;There is only one～way to succeed. 取得成功只有一種可靠的方法。have～knowledge of sb's promotion 有某人被提拔的可靠消息;make a～step out of the mud 從泥潭中跨出穩(wěn)健的一步;〖同〗trustworthy，dependable，firm，faithful;〖反〗unworthy，faithless，untrue，undependable，unreliable;

be sure to do sth/be sure and do sth 一定要，千萬：Be～to/and switch off the television. 一定要關(guān)電視機。Be～not to omit anyone from the list. 名單上千萬不要漏掉任何人。

for sure 無疑地，有把握地：He would give us his decision for～by Wednesday. 周三以前他肯定會告訴我們他的決定。

make sure of/that 1)查明(弄清楚)：He looked behind him to make～he was not being followed. 他轉(zhuǎn)身向后看以確保自己沒有被跟蹤。2)設(shè)法確保：Make～that the room is properly locked. 一定要把房間的門鎖好。

sure of oneself 很自信：She seems very～of herself，but she isn't really. 她似乎很自信，但實際并不是那樣。

sure thing 是的;當(dāng)然(infml，尤AmE)：I've been luckier than a lot of people，～thing，but that doesn't mean I'm satisfied with things as they are. 當(dāng)然我比許多人都幸運，但這并不是說我對現(xiàn)狀很滿意。

to be sure 誠然，肯定(fml)：He's a nice person，to be～，but not very clever. 誠然，他是個好人，但并不十分機靈。

→′sureness n 確切性;′sure-fire adj 必然的;

adv(1)確實，當(dāng)然(certainly)(infml，尤AmE)：S～I(xiàn)'ll help you. 我肯定會幫助你?！癢ould you like to come!”“S～!”“你來好嗎?”“當(dāng)然!”

sure enough 果然：I said it would happen，and～enough it did happen. 我說會發(fā)生的，果然被我說中了。

→′sure-footed adj 腳步穩(wěn)健的;′surely adv 確實地;無疑地;必然地;

【辨異】sure與 certain、confident和positive的區(qū)別見CERTAIN。