•[+ to infinitive] Engineers acted quickly to repair the damaged pipes.技师马上采取行动维修损毁的管道。

•She acted without thinking.她不加思索就采取了行动。

•The anaesthetic acted (= had an effect) quickly.麻醉剂很快起了作用。

•Who is acting for/on behalf of (= who is representing) the defendant?谁是被告的代理律师？

•He acted as if he'd never met me before.他摆出一副好像以前从没见过我的样子。

•Don't be so silly - you're acting like a child!别傻了——你的行为简直就像个孩子！

•He never acts on other people's advice (= does what other people suggest).他一意孤行，从不听取别人的建议。

•Acting on impulse (= without thinking first) can get you into a lot of trouble.意气用事，后患无穷。

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•Ellis Pike was chosen to act the part of the lawyer in the film.艾理斯‧派克被选中在影片中扮演律师这个角色。

•Have you ever acted in a play before?你以前演过戏剧吗？

•Why are you always acting the fool?你为甚么老装傻？

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•He was asked to act as an advisor on the project.他被请去担任那个企划案的顾问。

•Some people say that capital punishment acts as a deterrent.一些人认为死刑有威慑作用。

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•The children acted out their favourite poem.孩子把他们最喜爱的诗歌表演出来。

•Children's negative feelings often get acted out in bad behaviour.儿童的消极情绪常会透过不良行为表现出来。

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•Sophie got bored and started acting up.索菲心中感到烦闷，就开始调皮捣蛋起来。

•My car always acts up in cold weather.天冷时，我的车老出故障。

•Her shoulder was acting up (= hurting because of injury).她的肩伤发作。

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•an act of aggression/bravery/madness/terrorism侵略行为／英勇行为／疯狂的举动／恐怖主义活动

•a kind/thoughtless/selfish act善举／轻率的举动／自私的行为

•The sexual act itself meant little to her.性行为本身对她来说无所谓。

•The simple act of telling someone about a problem can help.就算是仅仅将问题对他人倾吐也会对自己起到帮助。

•Primitive people regarded storms as an act of God.原始人认为风暴是神的所为。

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•Was she really upset or was that just an act?她是真的生气还是只装装样子？

•a comedy/juggling/trapeze act一段喜剧／杂耍／高空秋千表演节目

•Our next act is a very talented young musician.表演下一个节目的是一位元才华横溢的年轻音乐家。

•Shakespeare's plays were written in five acts.莎士比亚的戏剧是按五幕剧格式创作的。

•The hero does not enter until the second act/Act Two.男主角直到第二幕才出场。

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•an act of parliament国会法案

•the Betting and Gaming Act《赌博法》

•Almost two hundred suspects were detained in Britain last year under the Prevention of Terrorism Act.根据《防止恐怖主义法》，去年英国有将近200名嫌疑犯被拘留。

•The state legislature passed an act banning the sale of automatic weapons.州议会透过了一项禁止销售自动武器的法令。

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•His presidency was very successful - it'll be a hard act to follow.他的总统生涯成就辉煌，这让其继任者难望其项背。

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•Tim always does a vanishing act when my mother comes to stay.我妈一到这儿来住，蒂姆就溜之大吉。

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•She's so disorganized - I wish she'd get her act together.她做事很没有条理——我希望她能够做到有条不紊。

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•We did all the hard work of setting up the company, and now everyone wants to get in on the act.我们千辛万苦创立了公司，现在谁都想来分一杯羹。

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•He's just putting on an act for the boss's benefit.他做戏只是为了给老板看。