assure verb ⇨check2 (He assured himself of her safety.)⇨ensure (assure sb a place in the finals)⇨promise (She's perfectly safe, I can assure you.)
check2
verb
check for mistakes/damage检查错误／受损情况Go and check that I've locked the windows.去查看一下我是不是把窗户锁上了。limitcheck the growth of public spendingmark1check the boxsuppress2check your tearscheck ♦︎ make sure ♦︎ verify ♦︎ assure yourselfThese words all mean to find out if sth is true.这些词均表示核实、核准、查明。PATTERNS AND COLLOCATIONS 句型和搭配◆to check / verify sth with sb◆to check / make sure / verify / assure yourself that...◆to check / verify what / whether...◆to check / verify the accuracy / authenticity / results (of sth)◆to go and check / make sure◆to always check / make sure / verify sth■check [intransitive, transitive] to find out if sth is correct or true or if sth is how you think it is查明；查看；核实◆Go and check that I've locked the windows.去查看一下我是不是把窗户锁上了。◆'Is Mary in the office?' 'Just a moment. I'll go and check.'“玛丽在办公室吗？”“请稍等，我去看看。”◆You'd better check with Jane what time she's expecting us.你最好跟简确认一下她见我们的时间。■make ˈsure
idiom
to check that sth is true or has been done核实，查明，弄清（某事是否属实或已做）◆She looked around to make sure that she was alone.她环顾四周，确认周围没人。◆I think the door's locked, but I'll just go and make sure.我认为门已经锁了，但我还是会去检查一下。■verify / /ˈverɪfaɪ/ / [transitive, intransitive] (formal) to check that sth is true or accurate核实；查对；核准◆We have no way of verifying his story.我们无法核实他的说法。◆Please verify that your password was entered correctly.请核实你的密码是否输入正确。 see also verifiable ⇨ reliable2■assure yourself (formal) to make yourself certain about sth; to tell yourself that sth is certain（使自己）确信，确定◆He assured himself of her safety.他确定她是安全的。◆She assured herself that the letter was still in the drawer.她查清楚信仍在抽屉里。
ensure
verb
ensure ♦︎ make sure ♦︎ guarantee ♦︎ assure ♦︎ see to it that...These words all mean to make sth certain to happen.这些词均表示保证、确保。PATTERNS AND COLLOCATIONS 句型和搭配◆to ensure / make sure / guarantee / see to it that...◆to ensure / guarantee / assure the success / survival / quality of sth◆to absolutely ensure / guarantee / assure sth◆to make absolutely sure◆to virtually ensure / guarantee / assure sth■ensure ( insure, especially in NAmE) / /ɪnˈʃʊə(r), ɪnˈʃɔː(r); NAmEɪnˈʃʊr/ [transitive, intransitive] (ratherformal) to make sth certain to happen; to check that sth is done保证；确保；务使◆The book ensured his success.这本书使他笃定会成功。◆Please ensure that all lights are switched off.请务必将所有的灯关掉。■make ˈsure
idiom
(made, made)to do sth in order to be certain that sth else happens确保；设法保证◆Make sure (that) no one else finds out about this.绝对不能让任何人发现这件事。◆They scored another goal and made sure of victory.他们又进了一个球，这就赢定了。■guarantee /ˌgærənˈtiː/ / [transitive] to make sth certain to happen保证；确保◆Tonight's victory guarantees the team's place in the final.今晚的胜利确保了这个队能进入决赛。◆These days getting a degree doesn't guarantee you a job.如今获得学位并不保证你能找到工作。■assure /əˈʃʊə(r), əˈʃɔː(r); NAmEəˈʃʊr/ [transitive] to make sth certain to happen保证；确保◆Victory would assure a place in the finals.赢得比赛将确保能进入决赛。◆This achievement has assured her a place in the history books.这一成就确定了她将在史册中留名。NOTE辨析 Ensure, guarantee or assure?Ensure is often used in orders or instructions. * ensure常用于命令或指示◆Please guarantee/assure that all lights are switched off.Assure and guarantee can suggest that feelings of worry or doubt about sth are removed; guarantee, but notassure is often used in negative statements to show that feelings of worry or doubt are not removed. * assure和guarantee可用来表示排除担心或疑虑。guarantee常用于否定句，表示没有排除担心或疑虑，assure则不这样用◆Getting a degree doesn't assure you a job.■ˈsee to it that...
phrasal verb
(saw, seen)to give your attention to sth in order to make sure that it is done确保；务使◆Can you see to it that the fax goes this afternoon?你务必今天下午就把传真发出去，好吗？
promise
verb
promise ♦︎ guarantee ♦︎ swear ♦︎ pledge ♦︎ commit ♦︎ assure ♦︎ vow ♦︎ undertakeThese words all mean to tell sb that you will definitely do sth or that sth will happen.这些词均表示许诺、保证、发誓。PATTERNS AND COLLOCATIONS 句型和搭配◆to swear / vow to sb (that...)◆to promise / guarantee / swear / pledge / vow / undertake to do sth◆to promise / guarantee / swear / pledge / vow that...◆to promise / guarantee / pledge your support◆to swear / pledge allegiance / loyalty◆to swear / vow revenge / eternal friendship / undying love◆to solemnly promise / swear / vow / undertake sth■promise [transitive, intransitive] to tell sb that you will definitely do or not do sth, or that sth will definitely happen许诺；答应；保证◆'Promise not to tell anyone!' 'I promise.'“你要保证不告诉任何人！”“我保证。”◆I'll see what I can do but I can't promise anything.我会看看我能做什么，但不能作什么承诺。◆You promised me (that) you'd be home early tonight.你答应过我今晚会早回家的。◆'I'll be back soon,' she promised.“我马上回来。”她答应说。◆He promised the money to his grandchildren.他答应把这笔钱留给孙辈。■guarantee / /ˌgærənˈtiː/ / [transitive] to tell sb that sth definitely will or will not happen, or that you defintely will or will not do sth保证；担保；保障◆Basic human rights, including freedom of speech, are now guaranteed.包括言论自由在内的基本人权如今都有了保障。◆The ticket will guarantee you free entry.这张票将保证你免费入场。◆We guarantee to deliver your goods within a week.我们保证一周内交货。NOTE辨析 Promise or guarantee?When you promise sth, you make a personal commitment to the person you are talking to, usually to do sth. Guarantee is less personal: when you guarantee sth, you mean that you will make sure that it happens. You have a moral duty to do what you have promised, but no one can legally force you to do it. You may have a legal duty to do what you have guaranteed, but people often use the word guarantee without actually accepting a legal duty: they mean it as a stronger form of promise. * promise指作出个人之间的承诺，通常指承诺做某事。guarantee不那么个人化，表示保证某事会发生。promise指作出道德上有义务兑现的承诺，但该承诺不具有法律约束力。guarantee可以指作出法律上有履约义务的保证，但使用这个词时常常并不真的表示具有法律效力，只是一种比promise语义更强的保证。■swear(swore, sworn) [transitive, intransitive, no passive] to make a serious or official promise to do sth or to tell the truth, for example in court郑重承诺，发誓（如在法庭上）◆She made him swear not to tell anyone.她让他发誓不告诉任何人。◆He swore revenge on the man who had killed his father.他发誓要报杀父之仇。◆I swear to God I had nothing to do with it.我对天发誓，我跟这事一点关系都没有。◆Witnesses were required to swear on the Bible.证人须手按《圣经》宣誓。◆ (spoken) I think I put the keys back in the drawer, but I couldn't swear to it(= I'm not completely sure).我想我把钥匙放回抽屉里了，不过我不敢肯定。■pledge [transitive] to formally promise to give or do sth正式承诺；保证给予（或做）◆Japan pledged $100 million in humanitarian aid.日本承诺提供1亿元的人道主义援助。◆Politicians of all parties pledged their support for the idea.各党派的政客都保证支持这个主张。◆The government has pledged that it will not raise taxes.政府保证不增加税收。■commit(-tt-) [transitive] to promise sincerely that you will definitely do sth or keep to an agreement or arrangement, knowing that failure to do so may make things difficult for you; to give an opinion or make a decision openly so that it is then difficult to change it承诺，保证（做某事、遵守协议或遵从安排）；（公开）表明意见，作出决定（使得日后难以更改）◆Several countries were reluctant to commit themselves to the treaty.有几个国家不愿签署这项条约。◆The party was committed to reforming the electoral system.该党承诺要改革选举体制。◆You don't have to commit yourself now, just think about it.你不必现在表态，只需考虑一下这事。 see also committed ⇨ reliable1■assure / /əˈʃʊə(r), əˈʃɔː(r); NAmEəˈʃʊr/ [transitive] to tell sb that sth is definitely true or is definitely going to happen, especially when they have doubts about it（尤指有质疑时）使确信，向⋯保证◆We were assured that everything possible was being done.我们得到保证：正在尽一切努力。◆She's perfectly safe, I can assure you.她绝对安全，我可以向你保证。◆We assured him of our loyal support.我们向他保证会忠诚地支持他。■vow /vaʊ/ / [transitive] (ratherformal, especiallywritten) to make a formal and serious promise to do sth起誓；立誓；发誓◆She vowed never to speak to him again.她发誓再也不和他说话。◆They vowed eternal friendship.他们立誓要友谊长存。NOTE辨析 Swear or vow?People can swear that things are, have been or will be true, but vow is more often used to talk about things you are determined to do in the future. * swear可以指发誓事情在过去、现在或将来会如此，但vow较常指发誓将来一定做某事。■undertake /ˌʌndəˈteɪk; NAmEˌʌndərˈteɪk/ (undertook, undertaken) [transitive] (formalorbusiness商业) to agree or promise that you will do sth承诺；许诺；答应◆They undertook to finish the job by Friday.他们答应周五之前完成这一工作。