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1、Unit3learningaboutlanguageComputersDiscoveringusefulwordsandexpressionscompletechangeinwaysofthinking,working,etcconnectedcomputersystemtomakethingseasiertofindtheanswerusingnumberscanbemovedeasilyfromplacetoplacerevolutionnetworksimplitycaculatemobilecompleteexplorewebtechnolo
2、gyartificialapplicationintelligentlogicallrealityDiscoveringusefulstructuresAnewPChasbeenbought.Mycomputerhasbeenrepairedquickly.Mycomputerhasbeenattacked.Theproblemhasnotbeensolvedyet.Thecompany’scomputershavebeengivenaway.Akindofintelligentrobothasbeendeveloped.现在完成时的被动语态表示动作
3、发生在过去,到现在已经完成或对现在仍有影响,其构成是:have/hasbeen+done。Thedirtyclotheshavebeenwashed.脏衣服都已经洗了。Theplanhasbeenstudiedbytheexpertsforthreetimes.这项计划已经由专家研究过三次了。现在完成时被动态:have/has +been+动词过去分词现在完成进行时:have/has+been+动词现在分词现在完成时被动态与现在完成进行时的比较:它们的构成的区别在最后的动词上,被动态接的是过去分词形式,现在完成进行时接的是现在分词形式。TheTemp
4、leofZhangFeihasbeenrebuilt.张飞庙已经过重建。1.主语是行为动作的承受者。Thedoorhasbeenlocked.门已经被锁上了。(我或别人现在进不去)2.说话时已经完成的动作或出现的结果。Hehasbeentoldaboutitformanytimes.有人告诉他这事很多次了。(可能还会有人告诉他)3.动作或状态始于过去,持续到现在,并可能持续下去。We’llstartassoonastheworkhasbeenfinished.工作一完成我们就立即动身。4.用在时间和条件状语从句中,表示将来某时已完成的动作。often
5、,usually,always,never,hardly,seldom等副词置于have/has和been中间。[误]Suchamanhasbeenhardlybelieved.[正]Suchamanhashardlybeenbelieved.注意:1.副词的位置happen,takeplace,breakout,belongto,cost,last等不及物动词或词组无被动语态。[误]GreatchangeshavebeentakenplaceinChinasince1978.[正]GreatchangeshavetakenplaceinChinas
6、ince1978.2.并不是所有动词都有被动语态2)open,break,drop等不强调动作发出者时常用主动语态。[误]Thedoorhasbeenopenedofitself.[正]Thedoorhasopenedofitself.TheSARSpatientshavebeentakengoodcareof.3.短语动词不可分割或省略其中的介词或副词如borrow,finish,begin,buy,start,return,marry,open,join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思,则需改换动词或时
7、态。4.一些特殊动词Mybrotherhashad(不能用hasbought)thisbikeforalmostfouryears.Howlonghasthisbookbeenbought?Howlongagowasthisbookbought?1.----Howlong____atthisjob?----Since1990.A.wereyouemployedB.haveyoubeenemployedC.hadyoubeenemployedD.willyoubeemployed2. Whenandwheretogofortheon-salaryhol
8、iday____yet.A.arenotdecidedB.havenotbeendecidedC.isnot