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adj(1)肯定(無疑)的，一定的(always true;without doubt)[作pred][A+that，A+to-inf]：It is～that he will succeed/he won the election. 他肯定會成功/在選舉中獲勝了。It is～that the world is round.地球肯定是圓的。That we should stay together/the diamonds were real was～.肯定無疑，我們應(yīng)該一起留下來/鉆石是真的。Whether he will do it is not～.他不一定干。One thing is～： he is right . 有一點是肯定無疑的：他沒錯。He is (pretty)～to succeed/to return/to forget.(很)肯定他會成功/會回來/會忘記。The duties are～to be heavy.這些職責(zé)一定很重。The strikes are～to have been given careful consideration.這些罷工一定經(jīng)過了精心的策劃。It is～to produce a strong impression. 這肯定會產(chǎn)生強烈影響。〖同〗sure，definite，positive;〖反〗unsure，indefinite，doubtful，unlikely;

(2)確信的，有把握的(positive in one's mind;absolutely sure)[作pred][A+that，A+wh，A+wh-inf，A(of/about)]：He is (quite/perfectly)～that she will succeed/I will get over my illness/they saw us. 他(很/完全)有把握她會成功/我會痊愈/他們看見我們了。Are you～that you'll come/you left the book here? 你肯定會來/是把書落在這兒了嗎? Be～you arrive on time.你一定要準(zhǔn)時到達。You may be～I will hurry.你可以放心我會抓緊的。He is not～whether she will come/who the man is/what to do.他不能肯定她是否會來/那人是誰/該怎么辦。He is～of her success/the future/what they said.他對她的成功/未來/他們說的話確信不疑。He is～about her qualifications for the post/her ability to handle the job.他確信她擔(dān)任這個職務(wù)是稱職的/她有能力處理這項工作。I'm not quite～of(about) it.我對此把握不大。Are you～of what you say? 你對你說的情況確信無疑嗎? 〖同〗sure，positive，confident;〖反〗uncertain，doubtful;

(3)肯定的，無疑的(sure beyond all doubt or question;inevitable)[作attrib]：Being constantly late is a～way of losing one's job.經(jīng)常遲到無疑會丟掉工作。The new medicine is an almost～remedy for this disease.這種新藥對醫(yī)治該病有可靠的療效。It's a～cure for the disease/the illness/a headache.這肯定能治這種病/這種病/頭痛。face～death/defeat必死/敗無疑;Capture means～death.抓住就得死?！纪絛efinite，inevitable;〖反〗indefinite，unlikely，doubtful;

(4)某些，不確定的(specific but not definitely named or described)[作attrib]：～members of Parliament/government某些國會議員/政府官員;for～reasons由于某些原因;on～conditions在某些條件下;There were～laws for automobile safety.關(guān)于汽車安全有一些法律規(guī)定。There were～differences constantly cropping up.總是不斷出現(xiàn)一些分歧?！纪絪pecific，particular;

(5)某(個)(named but not well-known)[作attrib]：A～Mr Jackson telephoned you just now.剛才有個叫杰克遜的先生給你打電話來。A～person has been asking questions about you.有個人一直在詢問你的情況。〖同〗 specific，particular，individual;

(6)有點(些)(some(but not much))[作attrib]：to a～degree/extent到某種程度/范圍;There is a～hostility in his manner/coldness in his attitude/amount of improvement in his health.他的態(tài)度有點敵意/態(tài)度有點冷淡/健康狀況有所好轉(zhuǎn)。have a～amount of admiration for sb對某人有些欽佩;a～share of the profits一份利潤;make a～profit/concession獲得一些利潤/做出一些讓步;feel a～reluctance/coldness覺得有點不情愿/冷漠;rouse a～enthusiasm激起一定的熱情;〖同〗specific，particular;

for certain肯定(無疑)地，有把握地：I know (don't know/can't say) for～that he is lying/what will happen. 我肯定(不肯定/不能肯定)他是在撒謊/會發(fā)生什么事。I shall be there/It will happen for～. 我肯定在那兒/這肯定會發(fā)生。

make certain that 弄(搞，問)清楚(確實)：You'd better make～(that)he doesn't have any weapon on him/this is the right number你最好搞清楚他身上確實沒帶武器/這個號碼確實沒錯。Please make sure(that) he'll be there.請搞清楚他確實會去那兒。I think he is dead， but you'd better make～. 我想他是死了，但你最好確認一下。

make certain of 確保：He hurried off to the theatre to make～of getting a good seat.他匆忙趕往劇院以確保占個好位子。No one can make～of living till one hundred.沒有一個人能確保自己活到100歲。Always make～of your facts.永遠要保證事實準(zhǔn)確無誤。

→′certainty n 肯定(必然)的事;必然，確實;un′certain adj 不確定(知)的;′certainly adv;

pron 某(有)些(some but not all(of))[接of]：C～of the things he said were downright lies.他說的事有些是徹頭徹尾的謊話。C～of the people complained more loudly than others.有些人抱怨得比別人更厲害。

【說明】 He is certain to succeed. It is certain that he will succeed.是說話者肯定地認為主語(he)一定能成功。(見第(1)義)。He is certain of succeeding/his success.意思不完全相同，是指主語(he)自己的精神狀態(tài)(自己確信自己肯定能成功，但不一定正確)(見第(2)義)。

【辨異】 certain與sure語義相近，用法亦差不多，?？苫Q，如：都可用于be～to do sth，be～that ...，make～that等結(jié)構(gòu);但是有差別。用法上，在 It is～that 和think it～that 結(jié)構(gòu)中，只可用certain，不可用sure;語義上，當(dāng)確知真相、有肯定的理由消除懷疑時用certain，僅僅是不懷疑時用sure，如：I'm certain he didn't steal it. I stole it myself.(我肯定他沒有偷。是我自己偷的。)I'm sure he didn't steal it. He's not that kind of person.(我確信他沒有偷。他不是那種人。)這種語義上的區(qū)別也反應(yīng)在certainly和surely上。還有confident(確信的)表示強烈的信念，如：I'm confident that I will succeed.(我確信我會成功。)positive(確信的)表示強烈的信念，甚至是過分地自信，有點武斷，如：I'm positive that he is mad.(我敢斷定他是瘋了。)