高中英语pep英语必修2课件_UNIT 3 Computers Grammar.ppt

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1、LearningaboutLanguageThePresentPerfectPassiveVoicerevisionWill/shall+be+V过去分词构成形式:一般将来时被动语态(FuturePassiveVoice)shall用于第一人称:I/we,will用于任何人称begoingtobe+V过去分词betobe+V过去分词否定句:一般疑问句:在will/shall后+not把will/shall提前Thestudentsofclassonewillcleantheplayground.Theplaygroundwillbecleanedbythes

2、tudentsofclassone.WearegoingtoholdameetingonSaturdayafternoon.Ameetingisgoingtobeheld(byus)onSaturdayafternoon.Thetwinsaretorepairthemachinetomorrow.Themachineistoberepaired(bythetwins)tomorrow.Thehostwillgivethewinneracomputerastheprize.获胜者将被赠予一台电脑作为奖励.Thewinnerwillbegivenacompute

3、rastheprize(bythehost).一台电脑将被赠给获胜者作为奖励.Acomputerwillbegiven(bythehost)tothewinnerastheprize.Lead-inAreyoufamiliarwiththesecomputers?Canyoucallthem?palmtoplaptop/notebookdesktopPCWWPCwrist-worn/wearablePCAwrist-wornPChasbeeninventedrecently.Apen-likecomputerhasalreadybeendeveloped.C

4、anyoumakemoresentencessimilartothesentencesabove?“have/hasbeendone?”Acalculatingmachine;replaceThebuildings;destroy;earthquakeAcalculatingmachinehasbeenreplacedwiththelaptop.Thebuildingshavebeendestroyedinanearthquake.Acalculatingmachinehasbeenreplacedwiththelaptop.Thebuildingshave

5、beendestroyedinanearthquake.3.Thesportsmeetinghasalreadybeenheldinourschool.Dotheunderlinedpartshavesomethingincommon?Discovering:has/havebeendone现在完成时被动语态现在完成时的被动语态thePresentPerfectPassiveVoice现在完成时的被动语态的用法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

6、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.Theimportantproblemhasbeendiscussedfornearlytwoweeks.Howlonghasthemachinebeenused?现在完成时的标志:recently/already/yetfor+一段时间/since+时间点句型Hehasbeensenttostudythenewtechnologyinthecompany.否定句:Hehasnotbeensenttostudythenewtechnologyintheco

7、mpany.一般疑问句:Hashebeensenttostudythenewtechnologyinthecompany?特殊疑问句:Wherehashebeensenttostudythenewtechnology?在have/has后加nothave/has提前疑问词+have(has)+主语+been+V过去分词.+...?Greatchanges________inthecity,andalotoffactories________.A.havebeentakenplace;havebeensetupB.havetakenplace;havebeen

8、setupC.havetakenplace;have