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(1)向……保證(擔(dān)保)(declare positively or confidently)[D+n+that]：I(can)～you that there is no danger/we are telling the truth/he is quite trustworthy.我(可以)向你保證沒有危險(xiǎn)/我們說的是實(shí)情/他是完全可以信賴的。He was～d that it was safe there/he would have an equal chance.他得到保證說那里很安全/他會(huì)得到平等的機(jī)會(huì)。You may be～d that we'll do all we can to help.你放心，我們會(huì)盡力幫助的。〖同〗 promise，guarantee;〖反〗deny;

(2)使確信(make sb/oneself feel sure or cer-tain)[T+n+prep(of)， D+n+that]：～sb of one's readiness to help/one's willingness to work/one's intention to come/one's ability to succeed/one's full support for his plan 使某人確信自己隨時(shí)會(huì)幫助/愿意工作/打算來/能夠成功/會(huì)全力支持其計(jì)劃;You may be～d of her innocence/her gratitude/her loyalty/her affection.你可以相信她的無辜/感激之情/忠誠(chéng)/愛?！玸b(oneself) of a success/a hearty welcome/the accuracy of the report/the safety of the machine 使某人(自己)確信會(huì)成功/會(huì)受到衷心的歡迎/報(bào)告是準(zhǔn)確的/機(jī)器是安全的;～sb(oneself) that the machine is safe/the patient will recover soon/nothing serious has happened 使某人(自己)確信機(jī)器是安全的/病人會(huì)很快康復(fù)/沒出任何嚴(yán)重問題;I'm～d that the plan will succeed/he is doing as I have told him to.我確信計(jì)劃會(huì)成功/他正在照我要求的做。(You can rest～d) Rest～d that I'll be there to help/he'll do all he can.(你可以)相信我會(huì)去那里幫忙/他會(huì)盡力的。

(3)確保，保證(make (a future event) certain;ensure)[T+n]：～sb's future/sb's happiness/sb's position/sb's election 確保某人的未來/幸福/職位/選舉獲勝;One more try/touchdown will～victory.再努力一下/得一次底線分勝利就在握了。The only way to～success is to work hard.確保成功的唯一辦法是努力工作。The contract/agreement～s the company's profit.這合同/協(xié)議確保公司的利潤(rùn)?！纪絜nsure，guarantee;

(4)保險(xiǎn)(insure sth，esp against sb's health)[T+n]：～ a house for its full value 按房子的全部?jī)r(jià)值投保;This insurance policy～s you against accident.這保險(xiǎn)政策可使你不受事故損失。What is the sum～d?投保金額是多少? 〖同〗insure;

→ as′sured adj 自信的;確定的;(the assured 參加人壽保險(xiǎn)的人);self-as′sured adj 自信的;as′suredly adv 肯定地;as′surance n 自信;保證;(英)保險(xiǎn);

【說明】一般來說，保人壽險(xiǎn)等(必定發(fā)生的事情)用assure，?；馂?zāi)、盜竊險(xiǎn)等(不一定發(fā)生的事情)用insure，與保險(xiǎn)公司打交道時(shí)，用詞要準(zhǔn)確。但日常生活中，可無需考慮。

【辨異】assure與ensure和insure都可當(dāng)“確?！敝v，但assure不如ensure常用;insure僅在AmE中才用于此義，此時(shí)比ensure稍常用一點(diǎn)，如：insure/ensure/assure success(確保成功)。insure和assure都可當(dāng)“保險(xiǎn)”講(ensure則不可)，如：insure/assure sb against accident(給某人保意外事故險(xiǎn))。