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1、Unit3ComputersLearningaboutLanguage1.Getstudentstoknowthestructureofthepresentperfectpassivevoice.2.Letstudentslearntheusagesofthepresentperfectpassivevoice.3.Getstudentstobecomeinterestedingrammarlearning.1.Areyoufamiliarwiththesecomputers?Canyoucallthem?palmtoplaptop/notebookdesktopP
2、CWWPCwrist-worn/wearablePCAwrist-wornPChasbeeninventedrecently.Apen-likecomputerhasalreadybeendeveloped.(1)Asyearshavegoneby,Ihavebeenmadesmallerandsmaller.(2)Awrist-wornPChasbeeninventedrecently.(3)Thesportsmeetinghasalreadybeenheldinourschool.has/havebeendone现在完成时被动语态现在完成时的被动语态2.Doth
3、eredpartshavesomethingincommon?Ⅰ.概念：1.说话时已经完成的动作或出现的结果。2.主语是行为动作的承受者。【注意】1.过去分词前有两个助动词have/has和been。2.必须表示被动。Ihavebeentoldaboutitmanytimes．Thebridgehasjustbeenbuilt．ThePresentPerfectPassiveVoice现在完成时的被动语态1.现在完成时被动语态肯定句句型：主语+have/hasbeen+过去分词Hermotorbikehasbeenstolen.2.现在完成时被动语态否定句句型：主语
4、+have/has+not+been+过去分词Thetaskhasnotbeenfinishedyet.Manyworkershavenotbeentrainedinthecompany.Ⅱ.句型：3.现在完成时被动语态一般疑问句句型：Have/Has+主语+been+过去分词...?Hasanewcomputerbeenbought?HavetheybeensentabroadtostudyEnglish?4.现在完成时被动语态特殊疑问句句型：疑问词+have/has+主语+been+过去分词...?Wherehasthecarbeenrepaired?Whoha
5、vebeenhelpedbythenewcomputer?Howmanybuildingshavebeenbuiltinthisschool?Thebuildings,destroy,earthquakeThebuildingshavebeendestroyedintheearthquake.Makingupsentencesusingpresentperfectpassivevoice:【即学即练】1.machinereplacecomputerThemachinehasbeenreplacedbythecomputer.2.newbridge,build,ino
6、urcityAnewbridgehasbeenbuiltinourcity.3.Manytreeshavebeenplantedalongtheroad.manytrees,plant,alongtheroad4.1.表示一个被动的动作发生在说话之前,强调对现在造成的影响和结果。Thedoorhasbeenlocked.2.表示一个被动的动作或状态开始于过去,持续到现在,并可能持续下去,常与for或since引导的时间状语连用,或用于Howlong...?句型中。Ⅲ.用法:Theimportantproblemhasbeendiscussedfornearlytwo
7、weeks.Howlonghasthemachinebeenused?现在完成时的标志:recently/already/yet/for+一段时间/since+时间点【点津】注意1.只有及物动词才有被动语态,不及物动词(词组)没有被动语态。例如:happen,takeplace,die,appear,disappear,fail,remain,lie,last,sit,stand,breakout,cometrue,belongto等。Whathashappenedtoyourbrother?2.但许多不及物动词加介词或副词构成的动词短语，相当于及物动词，也可以
