1. C 行为；行动；所为　a particular thing that sb does
2. C 法案，法令　a law that has been passed by a parliament
3. C 一幕　 one of the main divisions of a play, an opera, etc.
4. C 一段表演　 one of several short pieces of entertainment in a show
5. C 表演者；音乐人组合　 a performer or group of musicians
6. C 假装　a way of behaving that is not sincere but is intended to have a particular effect on others

　appreciate an ～ of kindness　感激仁慈行为
　commit a rash ～　轻举妄动
　commit an ～ of war against　对…采取战争行动
　commend an ～ of charity　称赞慈善行为
　do another noble ～　做另一件高尚的事
　do many ～s of kindness　做许多善事
　do wrongful ～s　为非作歹
　get into the ～　插手，参与，参加
　have no ～ in　没有参与
　pass an ～　通过法案，使法案成立
　perform a plucky ～　作出勇敢的举动
　play the baby ～　作出幼稚的举动
　practise an ～　练习一个动作
　praise an ～ of charity　颂扬善行
　put on an ～　装模作样
　aggressive ～　侵略行径
　amendable ～　修正法
　amusing ～　有趣的表演
　arbitrary ～　独断专行
　atrocious ～　粗暴的行为
　authenticated ～　决议书；认证的协议
　barbaric ～　野蛮行径
　barbarous ～　野蛮行径
　beneficent ～　慈善之举
　benevolent ～　仁慈的举动
　brave ～　勇敢的行为
　brutal ～　兽行
　childish ～　幼稚的举动
　churlish ～　粗暴的举动
　cogitative ～　深思熟虑的举动
　compromising ～　妥协方案
　compulsive ～　冲动的行为
　conscientious ～　谨慎认真的举动
　conspicuous ～　惹人注目的行为
　courageous ～　勇敢的行为
　covert ～　隐蔽的行动
　cowardly ～　怯懦的行为
　craven ～　怯懦的行为
　creative ～　创造性之举
　criminal ～　犯罪行为
　crowning ～　至高无上的行为
　cruel ～　残忍的行为
　daring ～　大胆的行动
　dastardly ～　卑劣的行为
　dauntless ～　大无畏的行动
　decisive ～　断然行动
　defensible ～　防御行动
　derisive ～　幼稚可笑的举动
　detestable ～　可恶的行为
　disadvantageous ～　不利的举动
　disdainful ～　轻蔑的举动
　disgraceful ～　不光彩的行为
　dishonorable ～　无耻的行为
　disinterested ～　无偏见的行为
　dreaded ～　令人畏惧的行动
　egotistic ～　自私的行为
　energetic ～　精力旺盛的行为
　exasperating ～　令人恼怒的举动
　expressive ～　富于表情的表演
　ferocious ～　野蛮的举动
　foolhardy ～　鲁莽的举动
　foolish ～　愚蠢的行为
　generous ～　慷慨之举
　governmental ～　政府的法案
　graceful ～　优雅的举止
　gracious ～　恩惠
　hardy ～　鲁莽行为，大胆行动
　hazardous ～　冒险行动
　heroic ～　英雄行为
　high-handed ～　高压手段
　horrific ～　可怕的行动
　hostile ～　敌对行动
　human ～　人道的行为
　ignoble ～　卑鄙行为
　ignominious ～　不光彩的行为
　illegal ～　不法行为
　illicit ～　违法行动
　illogical ～　不合逻辑的行动
　impolitic ～　失策之举
　imposing ～　给人深刻印象的举动
　impudent ～　厚颜无耻的行为
　incongruous ～　自相矛盾的举动
　incriminating ～　连累别人的行为
　indecent ～　下流的行为
　indiscreet ～　轻率的行为
　inexpiable ～　不能抵偿的罪过，不能赎的罪
　infamous ～　伤风败俗的行为
　inopportune ～　不合时宜的举动
　instinctive ～　本能的行为
　irrevocable ～　不可改变的行动
　judicial ～s　司法条例
　juridical ～　法律行为
　kind ～　善举
　laudable ～　值得赞许的行为
　laughable ～　可笑的行为
　lawless ～　违法行为
　loathsome ～　令人讨厌的行为
　lugubrious ～　故意装出的悲哀举动
　mean ～　卑鄙的行为
　meritorious ～　值得称赞的行为
　militant ～　好战行为
　mischievous ～　恶作剧
　monstrous ～　可怕的行为
　mutinous ～　变节行为，叛变的行为
　needless ～　多余的行为
　noble ～　高尚的行为
　offensive ～　进攻行动
　official ～　正式条文，官气十足的举动
　oppressive ～　暴虐行为
　overbold ～　鲁莽的行动
　overt ～　公开的行动
　questionable ～　可疑的行为
　rash ～　贸然行动，轻率的行动
　reprehensible ～　应受谴责的行为
　ritualistic ～　遵守仪式的行为
　ruthless ～　冷酷的行为
　salutary ～　健康的行为
　selfish ～　自私的行为
　self-confident ～　自信的举动
　servile ～　奴性的举动
　sexual ～　性行为
　shameful ～　可耻的行为
　specific ～　特殊的行动
　sublime ～　英勇的行为，崇高的行为
　superfluous ～　多余的行为
　suspicious ～　可疑的行为
　symptomatic ～　有征候的病情
　the land-lease ～　租借法案
　thoughtful ～　体贴的行为
　thoughtless ～　轻率的举动
　touching ～　动人的一幕
　unauthorized ～　越权行为
　unconstitutional ～　违反宪法的行为
　unfair ～　不公正的行为
　unfeeling ～　冷酷的行为
　unfortunate ～　使人遗憾的行为
　ungallant ～　怯懦的行为
　unknown ～　未被发觉的行动
　unpopular ～　不得人心的举动
　unremembered ～　忘却了的行动
　unspeakable ～　不能以言语表达的行为
　unwarrantable ～　不正当的行为
　unwise ～　不明智的行为
　valiant ～　英勇之举
　violent ～　狂暴行动
　virtuous ～　善良的行动，有功德的事
　voluntary ～　自发行动，自愿行为
　vulturous ～　贪婪的行为
　well-justified ～　充分证明为正当的行动
　well-planned ～　周密计划的行动
　wicked ～　邪恶的行径
　wilful ～　固执行为
　comedy ～　喜剧短节目
　dance ～　舞蹈短节目
　emergency ～　紧急法案
　juggling ～　杂耍短节目
　the National Insurance ～　国家保险法
　the Security A- 　社会安全条例
　the Social Security A- 　社会保险条例
　trapeze ～　高空秋千短节目
　between ～　幕间
　a play in five ～s　一出5幕的戏
　in the ～　当场，正在动作时
　in the (very) ～ of　正在…时，当场，在行动过程中
　under ～　根据法令
　～ of 　…的行为
　～ of a play　戏剧的一幕
　～ of aggression　侵略的行为
　～ of audacity　大胆的举动
　～ of bravery　勇敢的行为
　A- of bankruptcy　破产法
　～ of charity　慈善行为
　～ of clemency　宽厚的行为
　A- of Congress　国会法案
　～ of disposition　处分行为
　～ of execution　执行行为
　～ of faith　考验信仰力量的行为
　～ of God　天灾，不可抗力
　A- of Grace　大赦令
　～ of grace　恩惠
　～ of hostility　敌对行为
　～ of insulting nature　侮辱性的行为
　～ of justice　正义的行为
　～ of kindness　慈善行为
　～ of law　法律条例
　～ of love　友好行为
　～ of madness　疯狂行为
　～ of Parliament　〈英〉议院的法令
　～ of politeness　彬彬有礼的行为
　～ of retaliation　报复的行为
　～ of terrorism　恐怖行为
　～ of thoughtfulness　考虑周到的行动
　～ without thought　贸然行事

　Acts, not words, are what we need.　我们需要的是行动，不是空谈。
　Her first act was to shut the door.　她的第一个行动是关门。
　My first act was to run into the waiting room.　我的第一个行动就是跑进候车室。
　The act was committed with savage brutality.　这是野蛮行为的表现。
　The act of murder is the act of madness.　谋杀是疯狂的行为。
　The act of standing up made her head ache.　站起来她感到头痛。
　The sexual act itself meant little to her.　性行为本身对她来说没有什么。
　Act Ⅰ takes place in a castle.　第一幕的场景是一座城堡。
　The act ended and the lights were turned on.　幕终灯亮。
　Our next act is a very talented young musician.　我们的下一个演员是一位很有才华的年轻音乐家。
　The act broke up after 30 years. 　30年后这帮演员搭档分手了。
　It's a foolish act.　那是愚蠢之举。
　It was a brave act.　那是勇敢的行为。
　To kick a cat is a cruel act.　踢猫是残忍的行为。
　Slapping his face was a childish act.　打他的耳光是幼稚的举动。
　That's one true act of friendship.　那是一种真正友好的行为。
　It is the act of a mad man.　这是一种不审慎的行为。
　It is a noble act to help a blind man across the street.　搀扶盲人横过马路是高尚的行为。
　He ran into the burning house and saved the child. That was really a brave act.　他冲入着火的房子救出小孩，真是勇敢的行为。
　He committed many cruel acts.　他干了许多残忍的事。
　He returned to England, repeating his disappearing act so he wouldn't have to discuss scripts.　他回到英国，重施“销声匿迹”的故伎，免得别人要他谈论剧本。
　He kept up his balancing act between the two parties.　他继续在两党之间施展他的“平衡”的绝招。
　Tim always does a disappearing act whenever my mother comes to stay.　每当我的母亲来住时，蒂姆总是溜之大吉。
　They did the hospitality act in great shape.　他们格外殷勤地接待客人。
　He has committed terrible acts of violence.　他犯下了滔天的暴行。
　His presidency was very successful—it'll be a hard act to follow.　他当总统很成功——这将是别人很难赶上的。
　It is my own act. Why do you bring my mother in?　这是我自己做的事，为什么把我母亲扯进来?
　Parliament has passed an Act forbidding the killing of animals for pleasure.　议院通过了一项禁止杀生取乐的法令。
　I'm hoping that I shall like the second act.　我希望我会喜欢第二幕。
　Most modern plays have three acts.　最现代的戏剧通常有三幕。
　Ladies and gentlemen, please welcome our next act, the Lemon brothers.　各位女士先生，请欢迎我们下一个节目，雷蒙兄弟的表演。
　They're a brilliant comedy act.　他们是一群卓越的喜剧演员。
　They are a brilliant act.　他们是一对出色的搭档。
　They've got a very original act.　他们有了一档别出心裁的组合。
　His elaborate grief was just an act.　他那悲痛欲绝的样子不过是装腔作势而已。
　Don't take her seriously, it's all an act.　别跟她认真，她完全是装腔作势罢了。
　Don't feel sorry for her—all this crying's just an act.　别为她伤心——她的哭泣全是假装的。
　The act was passed by Congress and went into effect in August, 1980.　这项法令由国会通过，于1980年8月生效。
　The Natural Gas Policy Act was passed.　天然气法案被通过。
　This area was declared a National Park by an act of Congress.　根据国会的一项法案这一地区被宣布为国家公园。
　All water used by the Fire Brigade for fire extinction purpose is supplied free by an act of Congress.　根据议会的法案，消防队用于灭火的水全部免费供应。
　He was criticized for one careless act.　他因为一个粗心的动作而受到了批评。
　He paid for the foolhardy act with his life.　他为鲁莽的举动付出了生命的代价。
　From his acts he seems to be a fool.　从他的举动来看，他似乎是一个傻瓜。
　Shakespeare's plays were written in five acts.　莎士比亚的剧本分为五幕写。
　It is a play in five acts.　那是一出五幕剧。
　She was magnificent in Act One of Carmen.　她在歌剧《卡门》的第一幕中演得很出色。
　Hamlet kills the king in Act 5 Scene 2.　哈姆雷特在第五幕第二场戏中杀死了国王。
　He was accused of some 30 terrorist acts.　他被控搞了三十次左右的恐怖主义行动。
　He sat with his back to the stage all through the first act.　演第一幕时，他自始至终背向舞台坐着。
　The hero does not enter until the second act.　男主角直到第二幕才出场。
　The simple act of telling someone about a problem can help.　向别人讲述问题这一简单举动会有所帮助。
　Sometimes just the act of writing down the problems straightens out your thinking.　有时单把这些问题写下来，就会理清你的想法。

 ♣ act of God　
　天灾，不可抗力（如风暴、洪水、地震）　an event caused by natural forces beyond human control, such as a storm, a flood or an earthquake
　Primitive people regarded storms as an act of God.　原始人认为风暴是上帝所为。
 ♣ be an impossible〔hard〕 act　
　令人望而兴叹，令人难以企及　used in order to say that the way sb has done sth is so successful or impressive that it will be difficult for the next person, team, etc. who does it to be as good
　The department owes a lot to Amanda for her years of leadership—she's a hard act to follow.　该部门这些年来取得的成就都归功于阿曼达领导有方——她的能力令人望尘莫及。
　Shulman's magnificent first novel may be a nearly impossible act to follow.　舒尔曼的首部小说几乎是旷世之作。
 ♣ be〔get〕 in on the act　
　〈非正〉参与，插一手　 be〔become〕 involved in an activity that sb else has started, especially to get sth for yourself
　First it was politicians, now a novelist has decided to get in on the act.　开始是政客们，现在是一个小说家也决定染指其中。
　We did all the hard work of setting up the company, and now everyone wants to get in on the act.　我们辛辛苦苦地成立了公司，现在每个人都想来占便宜。
 ♣ in the act　
　正要做（某事）；当场　while doing, at the moment of doing
　It happened in the act, not before or after.　这件事不早不晚就发生在行动过程当中。
　A criminal was caught in the act.　罪犯在作案时被抓获。
　He denies all guilt, even though he was caught in the act.　他否认所有罪行，即便他是被当场抓住的。
　In the act of taking a bath, I heard a knock at the door.　我正要洗澡时，听到了敲门声。
　I was in the act of shooting him when I suddenly recognized him.　我正要向他开枪时，突然认出了他。
　She stopped in the act of turning and stared at me.　她转身时突然停下来盯着我。
　I caught him in the act of reading my private letters.　他正偷看我的私人信件时，被我撞见了。
　I photographed them in the act of stealing my car.　他们正在偷我的车时被我拍了照片。
　The farmer caught the boys in the act of stealing of his apples.　在孩子们偷苹果时，这位农夫抓住了他们。
　He was caught in the act of breaking into the house.　他在破门而入的时候被抓住了。
 ♣ put on an act　
　装模作样　behave in an insincere manner
　He's just putting on an act for the boss's benefit.　他正是为了老板的利益才装腔作势。
　Louisa put on an act, pretending she did not care about him in the least.　路易莎装腔作势，装出她一点也不把他放在心上的样子。
　Mary wasn't really happy, she was putting on an act.　玛丽并非真高兴，她是在强作欢颜。
 ♣ get one's act together　
　〈非正〉协同一致　begin to work together in an effective way
　If you want to be finished by Monday, you'll have to get your act together.　你如果想在星期一之前完成，就得作出合理安排。
　She's so disorganized—I wish she'd get her act together.　她如此杂乱无章——我希望她能有条理地筹划一下。

 ♣ act, action, deed, operation
　这组词的共同意思是“行为”。其区别是：
1. act和action常可替换，但act多指短暂的、单一的、个人的、具体的行为，强调后果；而action多指时间较长、过程较复杂的持续动作或行为，有时也指抽象的行动，强调过程。deed指比较复杂或业已完成的行为，多指伟大的、感人的行为；operation常指几个工作的组合。
2. act和deed是可数名词；action常用作可数名词，有时用作不可数名词；operation可用作可数名词或不可数名词。
3. act和operation是一般用词；action是较正式用词；deed是正式用词。

1. vi.行为；举止　 behave in a particular way
2. vi.〈非正〉假装　 pretend by your behaviour to be a particular type of person
3. vt. & vi.扮演　 pretend by your behaviour to be a particular type in a play or film〔movie〕
4. vi.充当；起作用　perform a particular role or function; start to have an effect

　～ the ass　当蠢人
　～ the experienced man　阅历丰富的人
　～ the fool　装傻子
　～ the idiot　装白痴
　～ the lord　装阔
　～ the part of Othello　扮演奥赛罗
　～ a play　演戏
　～ Shakespeare's play　上演莎士比亚戏剧
　～ advisably　明智地行动
　～ arbitrarily　一意孤行
　～ badly　表现不好
　～ bravely　表现得英勇
　～ cautiously　谨慎地行动
　～ contemptibly　行动卑鄙
　～ corrosively　起腐蚀作用
　～ cowardly in a battle　在战斗中表现怯懦
　～ craftily　行动狡猾
　～ dastardly　行动卑怯
　～ decisively〔manly〕　行动果断
　～ deliberately　行动审慎
　～ diplomatically　机巧地行事
　～ disloyally to　对…行为不忠
　～ foolishly　干得很愚蠢
　～ generously　表现很慷慨
　～ half-heartedly　做事不认真，马虎地行事
　～ hastily　仓促地行事
　～ ignobly　行为可耻
　～ immediately　立即行动
　～ indiscreetly　做事轻率
　～ judiciously　行动审慎
　～ nobly　行为高尚
　～ precipitately　行动鲁莽
　～ promptly　立即行动
　～ prudently　行动审慎
　～ rashly　轻举妄动
　～ responsibly　负责任地行事
　～ rightly　做得对，行为正当
　～ selfishly　自私地行动，表现自私
　～ sensibly　明智地行动，表现明智
　～ squarely and above-board　做事光明正大，正大光明地干
　～ unadvisedly　行动欠考虑
　～ unexpectedly　出乎意外地行动
　～ unwisely　不明智地行动
　～ vigorously　采取有力行动
　～ warily　谨慎地行动
　～ out　扮演，以动作表达
　～ out the story of the three bears　表演三只熊的故事
　～ out one's troubled feelings　表达出不安的心情
　～ up　（机器）出毛病，（病情）复发
　～ according to　按照…行动
　～ according to one's conscience　凭良心办事
　～ against advice　不按忠告行事
　～ against one's interest　违反自己的兴趣行事
　～ against order　违抗命令
　～ against rules　违反规则
　～ against the will of sb　违反某人的意志行事
　～ as　起…作用，扮演，充当
　～ as a buffer against...　作为对付…缓冲物
　～ as a conductor　担任指挥
　～ as a receptionist　当接待员
　～ as a spy　充当间谍
　～ as barrier　作为障碍
　～ as chairman　当主席
　～ as go-between　作为中间人
　～ as guide　做向导
　～ as an umpire　任裁判员，任公断人
　～ for　代理，代表…
　～ for one's interests　做有利于自己之事
　～ from a reason to oneself　出于个人考虑而行事
　～ from a sense of duty　凭责任感行事
　～ from jealousy　出于妒忌行事
　～ from caprice　做事任性
　～ from high or low motives　由于高尚或卑鄙的动机而行事
　～ from impulse　凭一时冲动行事
　～ from instinct　出于本能行事
　～ in cold blood　采取冷酷无情的行动；冷静地采取行动
　～ in collusion　一致行动
　～ in concert with　与…一致行动
　～ in contravention of　违反
　～ in coordination　配合行动
　～ in good faith　做事清白
　～ in self-defence　自卫行动
　～ in unison　与…一致行动
　～ like　行为像…，表现得像…
　～ like a wet blanket　行动使人扫兴
　～ like an ostrich　采取鸵鸟政策
　～ like one man　像一个人一样一致行动；齐心协力
　～ on〔upon〕　按…行事
　～ on a previously-determined plan　按既定计划办
　～ on a sudden impulse　凭一时心血来潮而行事
　～ on faith　根据信仰行事
　～ on impulse　凭一时冲动行事
　～ on information received　根据所得到的情报采取行动
　～ on mistaken orders　按错误的命令办事
　～ on nervous instinct　凭神经性的本能行事
　～ on one's knowledge of　根据自己对…的认识行事
　～ on one's principles　根据原则行事
　～ on previously-determined policy　按既定政策办
　～ on sb's advice　按照某人的指点行事
　～ on sb's behalf　代表某人行事
　～ on sb's request　按照某人的要求行事
　～ on the emotions of sb　在某人情绪影响之下行事
　～ on the idea　按照这个意见行动
　～ on the spirits of　发扬…精神
　～ on the suggestions made by...　根据…的建议办事
　～ on wrong views　按错误的观点办事
　～ out of kindness　行动出于善行
　～ out of pity　出于同情而做
　～ out of spleen　出于愤恨而行动
　～ through sb　通过（谁）而行事
　～ to the best of my judgement　竭力按照我的判断行事
　～ under　在…情况下行动
　～ under compulsion　被迫去做
　～ up　表现不好；行为不良；（机器）出毛病；作弄；开玩笑；（旧病）复发；恶化
　～ up to one's ideal　遵照某人的理想办事
　～ up to promise　履行诺言
　～ up to one's reputation　做符合某人声望的事
　～ with extreme caution　极其谨慎地行事
　～ with great composure　泰然自若地行事
　～ with the most perfect sense　极为通情达理地行事
　～ with vigour　办事精力充沛
　～ without any thought of the consequence　做事不考虑后果
　～ without a plan　盲目行事，胡搞，胡来
　～ without thinking　轻率行事

　How ought I to act?　我该怎么办呢?
　I can't act that way.　我不能这样做。
　Now at last Simon acted.　这时西蒙终于采取行动了。
　Think carefully before you act.　你要三思而后行。
　I don't think he acted quite right.　我看他做得不太对。
　I've acted like a total idiot.　我的行为完全像个白痴。
　John's been acting very strangely lately.　近来约翰的行为怪得很。
　Did the BBC act reasonably in sacking the journalist? 　英国广播公司开除该记者做得合理吗?
　Had the paramedics not acted so swiftly, he would have died.　要不是急救人员行动迅速，他就没命了。
　She claims that she acted out of necessity.　她声称自己是迫不得已而为之。
　Stop acting like spoilt children!　别再像惯坏的孩子那样胡闹了！
　The council must act quickly, before more people are killed on that road.　市政会必须迅速采取措施，以免更多的人在那条路上被撞伤亡。
　The court must establish whether the accused acted illegally.　法庭必须证实被告是否非法行事。
　The girl's life was saved because the doctors acted so promptly.　多亏医生行动迅速，女孩的生命得救了。
　The report said that the doctor had acted very responsibly.　报告说医生的诊治是很负责的。
　We acted in good faith—we did not know the goods were stolen.　我们做事清白，我不知道商品被偷了。
　Why don't you make up your mind to act at once?　你为什么不下定决心立刻采取行动?
　She is not really crying; she's just acting to get your sympathy.　她并没有真哭，只不过装哭以博得你的同情罢了。
　We must act now to prevent further damage to our rainforests.　我们现在必须行动起来制止对雨林的进一步破坏。
　Have you ever acted? 　你演过戏吗?
　How long have you been acting?　你演戏有多久了?
　I can't take her seriously because she always seems to be acting.　我没法认为她是认真的，因为她总是像在演戏。
　I don't think that play will act.　我看这个剧本没法上演。
　I've always wanted to act.　我一直以来都想演戏。
　Most of the cast act well.　这出戏大多数演员演得不错。
　Olivier is acting tonight.　奥利维尔今晚将要出演。
　The play is acting wonderfully well.　这出戏上演得非常成功。
　We acted on the stage last night.　昨晚我们上台表演了。
　You can't take her seriously because she always seems to be acting.　你不能对她太认真，她似乎一直在演戏。
　Does the drug take long to act? 　这药要过很长时间才发生作用吗?
　Don't expect the medicine to act immediately.　别指望这药能马上见效。
　The medicine acts well.　这药很见效。
　The drug failed to act.　这药没管事儿。
　The pump is not acting well.　这台泵运转情况不好。

　Don't act the ass.　别像个蠢驴似的。
　Stop acting virtue!　不要总是摆出一副道貌岸然的样子。
　He's always acting the experienced man who has seen everything.　他总是装出一副见多识广，颇为老练的样子。
　He acted the gentleman and slept in the armchair.　他像一位绅士一样睡在一张扶手椅子里。

　The people we met looked and acted happy, pleased with life.　我们遇见的人都表现出很高兴、生活愉快的样子。
　She acted calm although she was very worried.　她虽然很忧虑，可是都装得很沉着。
　Don't act so stupid.　别装得这样傻。
　Sometimes she acts young for her age.　有时候她装出年纪很轻的样子。
　The boy acted tired to avoid more work.　那男孩装出疲倦的样子，不想再干活了。
　Sometimes I act a lot older than I am, but people never notice it.　有时候我装出比我年纪大的样子，可是人们从来未觉察出来。
　He acted surprised and overjoyed.　他流露出又惊又喜的样子。

　He acts as if that he was ill.　看样子他像是病了。
　He acted as if he'd never seen me before.　他表现得好像从来就没有见过我似的。
　Just act as if nothing's happened.　就假装好像什么事都没发生过。

　In the evening they acted a play which Joe had written and a few friends came to see it.　晚上他们表演乔写的剧本，有几个朋友来看演出。
　She acts her part well.　她演得很好。
　She is acting the role of Juliet　她演朱丽叶这一角色。
　The boy is going to act the part of messenger in the play.　这个男孩将在剧中扮演通讯员。
　Who's acting Hamlet? 　谁演哈姆雷特?
　He acted the main hero in the play.　他在那出戏中演主角。
　Last week a new play was acted.　上星期演了一出新戏。
　The play was well acted.　这出戏演得不错。
　The play was acted for the first time last night.　这个剧昨晚首次上演。

 ♣ act against　(v.+prep.)
　违反　be against

　I acted against your advice.　我违背了你的劝告。
　They acted against the discipline of their school.　他们违反了学校的纪律。
 ♣ act as　(v.+prep.)
　充当　fulfill the post of sth
　A copper wire acts as a conductor.　铜丝可用作导体。
　I'll act as an interpreter for American tourists.　我将为美国旅游者当译员。
　Sometimes they acted as referees.　有时他们担任裁判员。
　He acted as secretary to the board.　他充任委员会的秘书。
　A trained dog can act as a guide to a blind person.　经过训练的狗能当导盲犬。
　Classroom testing most certainly acts as a stimulus to study.　课堂测验当然会对学习起到促进作用。
　The drugs act as a brake on the spread of the disease.　这些药物有制止这种疾病扩散的效果。
　This kind of tea acts as an aid to digestion.　这种茶可以帮助消化。
　You speak Greek—will you act as interpreter? 　你会说希腊语，那你能当翻译吗?
 ♣ act for　(v.+prep.)
　代表…行事　to be employed to deal with sb's affairs for them, for example by representing them in a court of law
　〔说明〕 本短语少用于被动结构。
　A solicitor acts for his clients.　律师代表他的当事人。
　Lawyers acting for the family will issue a statement this morning.　代表这家人的律师今天早上会发表一份声明。
　His lawyer acted for him; he did not appear in court himself.　他的律师代表他，他自己没出庭。
　He asked me to act for him at the meeting.　他叫我代表他出席会议。
　Please act for me during my absence.　我不在时，请充当我的全权代表。
　Will you please act for me in the matter?　请你替我处理这件事情好吗?
 ♣ act on〔upon〕　(v.+prep.)
1. 对…起作用；对…有功效 have an effect〔influence〕 on; take action as a result of advice, information, etc.
　Alcohol acts quickly on the brain.　酒精对大脑迅速产生影响。
　This medicine acts on the heart.　这种药对心脏起作用。
　Does the drug take long to act on the pain?　这药要很久才能发挥药效止痛吗?
　Acid acts on most metals.　酸对大多数金属起作用。
　By gravitation the sun and planets act and react upon one another.　太阳与行星通过引力发挥作用并相互影响。
　External things act on our sense organs and give rise to impressions in our brains.　外界事物作用于我们的感官，在我们的头脑中形成印象。
2. 奉行；按照…而行动 do what is suggested; follow
　Acting on information from a member of the public, the police raided the club.　警察根据一个老百姓的报告，突然搜查了这家俱乐部。
　Acting on your recommendation, they have decided to make a trip to Guilin.　根据你的建议，他们决定到桂林一游。
　He suggested what I should do and I acted on his advice.　他建议我做什么，我就做什么。
　I acted upon my own judgement.　我按照自己的判断行事。
　If what he proposes will benefit the people, we will act upon it.　如果他的建议对人民有利，我们就照办。
　She acted on our suggestion.　她按照我们的建议做了。
　The lawyer will act on your instructions.　律师将会照你的指示行事。
　The police are acting on information received.　警方正根据获得的情报采取行动。
　Why didn't you act on her suggestion? 　你为什么没有按照她的建议去做呢?
　Mind acts upon mind.　心照不宣〔心心相印〕。
　Such views, however, are not to be acted upon but to be criticized.　反之，这样的意见不但不该遵从，而且应受到批评。
　The order must be acted on by soldiers.　命令必须由士兵执行。
　If my advice had been acted upon, he would not have made that mistake.　他要是听了我的劝告，也不会犯那个错误了。
　If my advice had been acted upon, the firm would not have gone bankrupt.　如果我的建议被采纳，公司就不会破产。
3. （立即）行动（尤指处理紧急情况）do sth immediately, especially in order to deal with an urgent problem
　I'm acting on the deal with an urgent problem.　我正在处理紧急问题。
 ♣ act out　(v.+adv.)
1. 演出，表演 play a role on the stage
　Everybody roared when he acted out the speech.　当他把这段演讲表演出来时人们哄堂大笑。
　He acted out all that had happened to him.　他活灵活现地表演出他所遇到的事情。
　He tried to act out the story he had read.　他想把他读过的那篇小说搬上舞台。
　The children started to act out the whole incident.　孩子们开始表演整个事件。
　The teacher asked the students to learn the dialogue by heart and act it out in pairs the next day.　老师要求学生熟记那对话并在第二天两人一组把它表演出来。
　He got out his knife and acted out cutting into the bag.　他掏出刀子，比比划划地做着割睡袋的样子。
　He got out his gun and acted out shooting at him.　他拿出枪，比划着朝他开枪。
2. 实行，实现 put into action; express in actions and behaviour, rather than in words
　Please act out your dreams immediately.　请马上行动实现你这些梦想吧！
　They actually acted out their ideal.　他们确实把自己的理想变成了行动。
　There is a chance to act out one's fantasies.　有一个将幻想付诸行动的机会。
3. 履行（仪式）；将…表演出来 perform a ceremony or show how sth happened, as if performing a play
　The ritual of the party conference is acted out in the same way every year.　该党的大会程序年年照例执行。
　The scenarios that the trainees act out are videotaped.　实习生演示的情景被录了下来。
4. 充当（真实情况中的角色） act a part in a real situation
　She acted out the role of the wronged lover.　她扮作一个受冤枉的情人。
5. （用言辞或行动）将（想法或情感）表达出来 express your thoughts or behaviour
　He was acting out his feelings of inferiority by being overly aggressive.　他通过过于暴躁好斗的行为来宣泄自卑感。
 ♣ act to　(v.+prep.)
　对待　treat to
　He acts kindly to old people and children.　他对老年人和小孩很友善。
　She was wondering how to act to her superior.　她想知道怎样对待她的上司。
　Indeed, she acted like a mother to us.　她待我真像妈妈一样。
 ♣ act up　(v.+adv.)
1. 行动倔强，任性 behave in an unruly or capricious manner
　I'm sorry my boy was acting up in your house yesterday.　很抱歉，我的儿子昨天在你家里胡乱闹。
　The kids started acting up.　孩子们开始调皮起来。
　He told the naughty boy to stop acting up.　他叫那个顽皮的男孩不要再捣蛋。
　The children have been acting up all day, and I'm exhausted.　这个孩子闹了一天，把我弄得筋疲力尽。
2. （机器等）功能失常 (a machine, etc.) function improperly
　The car's engine is beginning to act up.　这辆车的引擎开始出毛病了。
　This old car is always acting up.　那辆旧汽车老是坏。
　How long has your ankle been acting up? 　你的脚踝受伤多久?
3. 炫耀，故意惹人注意 show off
　The kid is acting up for our attention.　孩子正在做各种动作来吸引我们注意。
　Her five-year-old daughter likes to act up before the visitors.　她那五岁的小女儿喜欢在客人面前逞能。
　Instead of acting on the stage she started acting up.　她不是在台上演戏，简直是在卖弄了。
4. （病痛等）复发 (a physical infirmity, etc.) become active after being quiescent
　I hope my back doesn't start acting up again.　希望我的背不会又开始出毛病。
　His arthritis began to act up again.　他的关节炎又开始发作了。
　The river often acted up in those days.　那时这条河常常泛滥。
5. 作出适当反应 respond appropriately
　The question was so unexpected that, for a moment, she was at a loss how to act up properly.　问题来得这么突然，她一时不知道如何作出恰当的反应。
　When the chaps tease him, he doesn't know how to act up.　当小伙子们取笑他时，他不知如何是好。
 ♣ act up to　(v.+adv.+prep.)
　实行，履行，遵守　put into practice; behave in such a way that one's actions are in accord with expectations, a promise, one's reputation, etc.
　He always acted up to the principle he set for himself.　他总是遵循自己所定的原则。
　I hope that he will act up to his promise.　我希望他会履行他的诺言。
　You must act up to the contract between us.　你们必须履行我们之间的这个合同。
　What you say means very little unless you act up to it.　你要是说而不做，你的话就没有多大意思了。
 ♣ act up with　(v.+adv.+prep.)
　对…无礼　behave in an unruly or capricious manner with sb
　The boy often acts up with his mother when she keeps him from smoking.　遇到他妈妈禁止他吸烟时，那个男孩经常对妈妈粗暴无礼。
　The young herdsman briskly mounted a horse that was inclined to act up with an unaccustomed rider.　年轻牧民轻快地跃上一匹惯于对生人使性子的马。
　The lad is fond of acting up with him.　男孩爱跟他捣蛋。
 ♣ act a part
1. 扮演一个角色 represent; perform, especially on the stage
　He acted a part in Othello.　他在《奥赛罗》中扮演了一个角色。
　Philip Schofield acted the part of Joseph.　菲力普·斯科菲尔德扮演约瑟夫一角。
2. 装腔作势 behave so as to seem good, true, etc.
　He walked as if nothing had happened to his leg, but everyone could see that he was merely acting a part.　虽然他走路时腿好像没有什么毛病，但是大家都看得出来他是装的。
　She smiled cheerfully, but I knew she was only acting a part.　她愉快地笑了，但是我知道那不过是装样子。
3. 具有…功能 have a natural or usual duty
　This chemical acts a part of an acid in our experiment.　这种化学药品在我们的试验中起酸的作用。
 ♣ act the fool
　装疯卖傻；瞎胡闹　play the fool
　He acted the fool so often that everyone got sick and tired of him.　他常常装疯卖傻，弄得人人都讨厌他。
　Some people act the fool now and then.　有些人时常装傻。
　The woman just acted the fool.　那个妇女只是装疯卖傻。
　Stop acting the fool!　别装傻了！

 ♣ act, act out
　它们的共同意思是“表演”，其区别在于：
1. act的宾语一般是戏剧或角色， act out的宾语则可以是故事、对话等。
2. act out更强调把内容、情感、思想等用动作而不是用语言表现出来。
 ♣ act as, act on
　这两个短语都可译作“起作用”，但含义并不相同， act as是“以…身份而起作用”; act on是“对…起作用”。也就是说act as的宾语是“起作用”的主体；而act on的宾语则是“作用”客体。
 ♣ act as, act for
　这两个短语意思有些相近，但并不相同，其区别在于：
1. act as后接表示职务的名词，而act for后多接人称代词，而少接职务名词。
2. act as强调的是职务，而act for强调的是所代替的人。
3. 带有act for句中的职务是临时的；而act as后接的职务既可是临时的，又可是长期的。
4. act as后接职务的是一个人，而担任act for句中的职务者有两个人，其中for后的人是正式的，长期的， act的逻辑的主体则是代理的，临时的。
5. act as后接的（职务）名词前往往省略冠词；而act for后接的名词一般情况下有the.
 ♣ act as, act like
　它们并非同义短语，后者只是一种自由搭配。它们的区别很明显：前者的意思是“是”，后者的意思是“像（而不是）”。另外， as后常省略冠词，而like后则多用冠词。再有， as短语一般看作主语补语（表示主语身份），而like短语一般看作方式状语。
 ♣ act as, serve as
　参见serve条。
 ♣ act the fool, act like a fool
　这两个短语的意思基本相同，只是前者强调主观上是有意识地装傻，后者则指其举止行为客观上看来如同傻子一般。
 ♣ act, behave
　这两个词的共同意思是“做”，在很多场合下可以互换。其区别是：
1. act强调采取行动；而behave强调人的行为是否符合某种行为标准，如道德或礼貌等。
2. act作“做”解时是不及物动词；而除用作不及物动词外，还可用作及物动词，跟反身代词。
 ♣ act, perform
　这两个词的共同意思是“演出”，常可互换。例如：
　Who is acting〔performing〕 the part of the main hero in the play?　谁在扮演剧中的主角?
　They acted〔performed〕 well.　他们演得很好。
　它们之间的区别是：
1. act强调的是“扮演（某角色）”; perform强调的是“表演（给人看）”，后者更侧重于表演的能力，技巧或效果。
2. act指戏剧、电影，而perform除指戏剧电影外，还包括器乐演奏及舞蹈等。
3. act的主语通常是人，而perform还可以是动物等。

　［派生词］ acting n.表演；演戏
　［同义词］ n. accomplishment, achievement, action, deed, exploit, feat, move, performance, step;bill, degree, edict, law, measure, official decision, ordinance, resolution, statute; main division of a play, short performance, routine, segment of play; fake, pose, pretense v. commit oneself, do it, do, execute, function, move, operate, perform, press on, put forth, behave, comport oneself, work, enact, impersonate, play, represent
　［反义词］ n. inaction, inactivity v. stay, stop rest, put off
　［词源］拉丁语actus（做，行为）