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TOEFL BNC: 1512 COCA: 1773


Word family
warn /wɔːn $ wɔːrn/ ●●● S3 W2 verb [intransitiveI, transitiveT]   worn
1 WARNto tell someone that something bad or dangerous may happen, so that they can avoid it or prevent it 警告,告诫;提醒
 ‘Be careful, the rocks are slippery, ’ Alex warned.
warn somebody about something
 Travellers to Africa are being warned about the danger of HIV infection.
warn (somebody) of something
 Salmon farmers are warning of the severe crisis facing the industry.
warn somebody (not) to do something
 I warned you not to walk home alone.
 Motorists are being warned to avoid the centre of London this weekend.
warn somebody (that)
 We warned them that there was a bull in the field.
2 WARNto tell someone about something before it happens so that they are not worried or surprised by it 预先通知〔某人以免其担忧或惊讶〕
warn somebody (that)
 Warn her you’re going to be back late.
In everyday English, people often use the expression let someone know rather than warn someone: 在日常英语中,人们一般用 let someone know,而不用 warn someone
Let me know if you’re not going to finish on time.
3warn (somebody) against something phrasal verbphr v WARNto advise someone not to do something because it may have dangerous or unpleasant results 〔因可能有危险或产生不良结果而〕告诫(某人)不要做〔某事〕
 Her financial adviser warned her against such a risky investment.
warn (somebody) against doing something
 The police have warned tourists against leaving the main tourist centres.
4warn somebody ↔ away phrasal verbphr v to tell someone that they should not go near something, especially because it may be dangerous 警告〔某人〕不要靠近
 The snake’s markings are intended to warn away predators.
Examples from the Corpus
5warn off phrasal verbphr v 
a) THREATEN warn somebody ↔ off to tell people that they should not go near something, especially because it might be dangerous 警告某人不要靠近
 Some animals mark their territory to warn off rivals.
b) WARN warn somebody off (doing) something especially British EnglishBrE to tell someone that they should not do or use something because it might be dangerous 告诫某人不要用某物/做某事
 Doctors should have warned people off using the drug much earlier than they did.
nGRAMMAR: Patterns with warn
You warn someone that something will happen (=you say it will definitely happen):
I must warn you that the treatment will have side effects.
In the past, you say that someone warned that something would happen (=they said that it would definitely happen):
Campaigners warned that the airport would harm the environment.
You warn that something might happen or could happen:
He warned that there might be another war.
Warn is also often used in the passive. You say that someone was warned about something:
We were warned about the dangers of global warming.
warn to tell someone about something bad or dangerous that might happen, so that they can avoid it or prevent it 警告;提醒
I warned you about sitting out in the sun too long.
We were warned that there could be delays on the motorway, so we took another route.
give somebody a warning to tell someone that if they continue to behave in an unsatisfactory way, they will be punished 〔就不良行为〕警告某人
He’s already been given several warnings about handing in his essays late.
nThe US gave a warning that if the hostages were not released, it would be forced to take military action.
alert to officially or publicly warn people of possible danger so that they can prevent it or be ready to deal with it 〔官方或公开地〕警告,报警
a campaign to alert people to the dangers of smoking
An anonymous caller alerted the police that a bomb was due to go off.
tip somebody off informal to secretly warn someone about something that is going to happen – used especially about warning the police about a crime 秘密警告某人;〔尤指〕向警察密报
The police found the drugs after being tipped off by local residents.
nInformants tipped the FBI off.
caution formal to warn someone to do or not to do something in order to avoid a dangerous or bad result 警告,告诫
People are being cautioned against using credit cards abroad, in case of fraud.
nHealth officials have cautioned the public to wash fruit thoroughly before eating it.
forewarn /fɔːˈwɔːn $ fɔːrˈwɔːrn/ [usually passive] formal to warn someone about something that is going to happen, so that they are expecting it or ready for it 预先警告;事先告知
We had been forewarned that the roads weren’t very good.
Examples from the Corpus
Origin warn
Old English warnian
TOEFL BNC: 1512 COCA: 1773


ADVERB | VERB + WARN | PREPOSITION | PHRASES ADVERBclearly, explicitly清楚地/明確地警告bluntly, firmly直白地/斷然警告The chancellor bluntly warned the Cabinet to cut public spending or face higher taxes.財政大臣直接警告內閣要麼削減公共開支,要麼提高稅收。darkly, sternly惡狠狠地/嚴厲地警告softly溫和地提醒'Don't,' he warned softly.“不要這樣。”他溫和地提醒道。specifically明確地警告We were specifically warned against buying the house.有人明確地警告我們不要買這所房子。duly適時地提醒Having been duly warned that I would get nowhere with my application, I went right ahead and applied anyway.雖然有人適時提醒我申請不會有什麼結果,我還是執意提出了申請。always, constantly, repeatedly不斷警告;再三告誡My mother constantly warned me not to go into teaching.媽媽不斷地告誡我不要去當老師。publicly公開地警告VERB + WARNhad better, have to, must, should最好提醒;不得不警告;必須提醒;應該提醒I must warn you that some of these animals are extremely dangerous.我必須提醒你這些動物中有些是極其危險的。I thought I should warn her about it.我想我應該為此提醒她一下。try to嘗試提醒I did try to warn you.我的確曾經試着提醒你。fail to未能告誡She claimed doctors had failed to warn her of the risks involved.她聲稱醫生沒有提醒她所涉及的風險。PREPOSITIONabout就⋯提出警告No one had warned us about the unbearable heat.沒有人警告過我們注意難以忍受的高溫。against告誡We were warned against drinking the local water.有人告誡我們不要喝當地的水。of關於⋯提出警告The report warns of the dangers of obesity.這份報告就肥胖的危險向人們提出了警告。They warned us of the risks involved.他們事先提醒了我們所涉及的風險。PHRASESbe warned要注意You will get better-but be warned, it may be a long process.你會好起來的,但要注意,這可能是個漫長的過程。
TOEFL BNC: 1512 COCA: 1773


warn ♦︎ caution ♦︎ alert ♦︎ tip sb offThese words all mean to tell sb about sth bad that is going to happen so that they can do sth about it. 这些词均表示提醒、告诫。PATTERNS AND COLLOCATIONS 句型和搭配to warn / caution (sb) against sthto warn sb / tip sb off about sthto warn / caution / alert sb / tip sb off that...to warn / alert / tip off the police / authorities warn [transitive, intransitive] to tell sb about sth dangerous or unpleasant, so that they can avoid it; to strongly advise sb to do or not to do sth in order to avoid danger or punishment 提醒;使警惕;警告I tried to warn him, but he wouldn't listen.我试图提醒过他,可他就是不听。He warned us against pickpockets.他提醒我们要提防小偷。I had been warned what to expect.有人事先提醒过我会出什么事。She warned Billy to keep away from her daughter.她警告比利离她女儿远点。The commander had been warned of the attack.有人已经警告过指挥官会有这次袭击。'I'm warning you!' said James, losing his patience.“我警告你!”詹姆斯不耐烦地说道。The guidebook warns against walking alone at night.这本指南告诫人们不要在夜间单独行走。 caution ˈkɔːʃn [intransitive, transitive] (formal) to tell sb about the possible dangers or problems of sth 警告;告诫;提醒I would caution against getting too involved.我要提出警告,不要介入太深。The government cautioned that pay increases could lead to job losses.政府警告说,提高工资可能会导致失业。 alert əˈlɜːt; NAmE əˈlɜːrt [transitive] to tell sb about a dangerous or urgent situation so that they can do sth about it 向⋯报警;使警惕;使戒备Neighbours quickly alerted the emergency services.邻居们很快向应急部门报了警。Alerted by a noise downstairs, he sat up and turned on the light.楼下的响声使他警觉,他坐起来打开灯。 see also alert watch noun ˌtip sb ˈoff

phrasal verb

(-pp-) (rather informal) to tell sb secretly about sth that is going to happen, especially sth illegal or sth that will give them an advantage in business 暗中警告,私下告诫,密报(尤指非法或能带来经济好处的事)Three men were arrested after police were tipped off about the raid.警方获得有关袭击的密报后,逮捕了三个人。He allegedly tipped off his friends, who sold shares in advance of the news becoming public.据称他向朋友泄密,令他们得以在消息公布前就把股票卖掉了。
TOEFL BNC: 1512 COCA: 1773

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