【课件】Unit+3Discovering+Useful+Structures课件人教版（2019）必修第二册+

人教必修二Unit3DiscoveringUsefulStructuresTalkaboutthingsthathasbeendone教学目

Lead-inLookatthepicture.Trytounderstandwhattheboysays.IwasinhospitalIamstillinhospital12ToknowthestructureandusageofpresentperfectpassivevoiceanditsdifferenceswithpresentperfectactivevoiceTousepresentperfectpassivevoice目标一：ToknowthestructureandusageofpresentperfectpassivevoiceanditsdifferenceswithpresentperfectactivevoiceActivity1:Discussinyourgroupsandtalkaboutthestructureandusageofpresentperfecttense,trytogivesomeexamples.Structure:S+has/have+pastparticipleExample:Shehascompletedtherunning.

1.Unfinishedeventsthatstartedinthepastcontinuetothepresent.e.g.IhavelivedinChangshaforfiveyears.(IstillliveinChangshanow.)e.g.IhavelivedinChangshasince2015.2Finishedeventsinsomeone'slife.(Ifthepersonisstillalive—lifeexperience)e.g.HaveyouevereatenSushibefore?3Finishedeventshappenedinthepastandtheimpactoftheeventisnowcontinuing.e.g.Hehasnotdonehishomework.(Effect:Hisfathercriticizeshim.)4Expressanactionthatfinishedrecently.e.g.Shehasjustcookeddinner.Activity2:Readthepairsofsentences.Underlineandcomparethedifferentverbforms.·(1)Jane'slifehasbeengreatlyimprovedbytheInternet.·(2)TheInternethasgreatlyimprovedJane'slife.·(3)MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.·(4)PeoplehavewrittenmuchaboutthewondersoftheWorldWideWebSentence1andsentence3arepassiveform,whileSentence2andsentence4areactiveform.Howdoweformthepresentperfectpassivevoice?Fillintheblank.VerbformActive

have/has+v-edPassivehave/hasbeen+v-edThePresentPerfectTenseStructuresExamplesActiveVoicePassiveVoiceS+have/has+PastParticiple+OS+have/hasbeen+PP+(by+O)Shehasjustreadabook.Abookhasjustbeenread(byher).ActiveVoicePassiveVoiceAffirmativeNegativeInterrogativeS+have/has+PP+O.e.g.Shehaspreparedlunch.S+have/hasnot+PP+O.e.g.Shehasnotpreparedlunch.Have/Has+S+PP+O?e.g.Hasshepreparedlunch?S+have/hasbeen+PP+(by+O).e.g.Thelunchhasbeenprepared(byher).S+have/hasnotbeen+PP+(by+O).e.g.Thelunchhasnotbeenprepared.Have/Has+S+been+PP+(by+O)?e.g.Hasthelunchbeenprepared?Activity3:Changethesentencesintothepresentperfectpassivevoice.

EXAMPLE:They'vebuiltakindofnewPCwithmorefunctions.AkindofnewPChasbeenbuiltwithmorefunctions.

1.Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.Thesoftwarehasbeendownloadedtohelpmyphonebatterylastlonger.2.Someonehaslostanidentitycard.Anidentitycardhasbeenlostbysomeone.3.HaveyouconfirmedtheWi-Fipassword?HastheWi-Fipasswordbeenconfirmed?4.Haveyoupressedthebuttonyettocopythefile?Hasthebuttonbeenpressedyettocopythefile?5.Hasanyonemadeacommentabouttheonlinedatabase?Hasacommentbeenmadeabouttheonlinedatabase?Activity4:Findoutthedifferencesinmeaningandfunctionbetweentheactiveandpassiveforms.

ActiveVoicee.g.TheInternethasimprovedJane'slife.PassiveVoicee.g.Jane'slifehasbeengreatlyimprovedbytheInternet.thedoeroftheactionthedoeroftheactionthereceiveroftheactionthereceiveroftheactionThesubject(theInternet)ofthesentenceisdoingtheaction.Theactionisdoneuponthesubject(theInternet).ActiveVoicee.g.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.PassiveVoicee.g.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.Meaningismoreclearanddirect.Thetoneisauthoritativeandsubjective.Meaningcanbeconfusingandindirect.Thetoneisneutralorobjective.Weusethepassivevoicewhen:Wewanttoemphasizetheactionmorethanthepersonwhoperformingit,becausetheactionismoreimportant.e.g.Hiswatchhasbeenstolen.Theagent(行为主体)isunknown,unimportantorobviousfromthecontext.e.g.Thisroadhasn'tbeenusedforalongtime.Wewanttobeformal,impersonal,academic.(likeformalreports,descriptionoftheprocess,instructions,academicwriting...)e.g.Muchresearchhasbeendoneaboutsecondlanguageacquisition.目标二：TousepresentperfectpassivevoiceActivity1:Readthepoem.Thenthinkofyourownsituationandwriteasimilarpoem.

LookatthewayyourfacehasbeenwashedLookatthewayyourteethhavebeenbrushedLookatthewayyourshoeshavebeencleanedYou'dbetterdothemagain.LookatthewaytheflowershavebeenplantedLookatthewaythegrasshasbeencutLookatthewaythepathshavebeensweptIhopethatyou'llcomehereagain.HowtoWriteaGoodPoem?Writingpoetryisawaytoconveyemotionsandmemorieswithoutdirectlystatingwhatyouaredescribing.Towriteagoodpoem,youshould:Choosethetypeofpoemyouwantittobe.Asabeginner,rhymingpoemsareagoodstructuretostartwith.Decideonathemeforyourpoem.Usedescriptivelanguagetoconveyemotions(metaphor,simile,...).Sample:Lookatthewaythepicturehasbeenpainted

Lookatthewaythesonghasbeenwritten

LookatthewaythefilmhasbeenmadeNowthinkaboutwhatyoucouldcreate.Lookatthe