高中英语 Unit3 Computers learning about language课件 新人教版必修2.ppt

unit3 learningaboutlanguage discoveringusefulwordsandexpressions completechangeinwaysofthinking working etcconnectedcomputersystemtomakethingseasiertofindtheanswerusingnumberscanbemovedeasilyfromplacetoplace revolution network simplity caculate mobile complete explorewebtechnologyartificialapplicationintelligentlogicallreality discoveringusefulstructures anewpchasbeenbought mycomputerhasbeenrepairedquickly mycomputerhasbeenattacked theproblemhasnotbeensolvedyet thecompany scomputershavebeengivenaway akindofintelligentrobothasbeendeveloped 现在完成时的被动语态表示动作发生在过去 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 thetempleofzhangfeihasbeenrebuilt 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 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 greatchangeshavetakenplaceinchinasince1978 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 则需改换动词或时态 4 一些特殊动词 mybrotherhashad 不能用hasbought thisbikeforalmostfouryears howlonghasthisbookbeenbought howlongagowasthisbookbought 1 howlong atthisjob since1990 a wereyouemployedb haveyoubeenemployedc hadyoubeenemployedd willyoubeemployed 2 whenandwheretogofortheon salaryholiday yet a arenotdecidedb havenotbeendecidedc isnotbeingdecidedd hasnotbeendecided 3 hi tom youlooktired ofcourse i thelivingroomallday a hadpaintedb painted c havebeenpaintedd havebeenpainting 4 millionsofpounds worthofdamage byastormwhichsweptacrossthenorthofenglandlastnight a hasbeencausedb hadbeencausedc willbecausedd willhavebeencause 5 haveyouever totheexhibitio