warn是常用动词,意思是“警告,告诫,预先通知”,它可以用作及物动词,后面直接跟宾语。比如:I'll run ahead and warn them.我跑在前头,警告他们。I tried to warn him, but he wouldn't listen.我设法提醒过他,可他就是不听。Warn有很多的句式会出现在阅读和写作中,需要我们熟知。下面重点讲讲常见的几种与warn搭配的句型。
1.warn somebody of something意思是“警告某人某事,警告某人会有某情况,警告提醒某人”。这个结构在完形填空或者选项题中常常出现,被考频率很高。比如:I warn them of the danger.我警告他们有危险。Warn everyone of the danger.警告所有人注意危险。
2. warn + sb.+that引导的从句引导的从句。比如:These accidents warn us that shared bikes are not for everybody.这些事故提醒我们,共享单车并不适合所有人。
that引导的从句后也可以跟虚拟语气,在使用时要根据语境做好判断。比如:I warn him that he should not touch alcohol.我告诫他不要喝酒。
3. warn+ somebody +动词不定式,表示劝说某人做某事。比如:I warn you to be a punctual.我劝你要准时。
4. warn sb.+ not+动词不定式,表示警告某人不要做某事。比如:I warn her not to go near the dog, but she ignored me, and it bit her.我警告她不要靠近那条狗,但她不听,结果被狗咬了。He warned us not to drive too fast.他警告我们开车别太快!
5.warn+sb+ against+动词的ing形式,表示“告诫某人不要做某事”,against后面要跟动名词。比如:He warned me against going there at night.他告诫我们晚上不要到那里去。
6.be warned+for+动词的ing形式,表示被警告,比如:The boxer was warned for breaking the rules.这个拳击手因违反规则而受到警告。
7.短语warn sb. off sth的意思是“警告某人离开,告诫某人不要接近”。比如:The farmer warned us off his fields.农民告诫我们不要进入他的地里。
warn的名词是warning,意思是“警告,告诫,提醒,预先通知”,它可用作可数名词。比如:The sirens sounded an air-raid warning.汽笛响起了空袭警报。They attacked without giving a warning. 他们不宣而战。
Before you dismiss him, you must give him advance warning in writing.如果要解雇他,就必须预先书面通知他。
warning还可以指“起警告作用的东西;前车之鉴;鉴戒”。比如:Let that be a warning to you.让这件事成为你的鉴戒。
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