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Teenagersshouldbeallowedtochoosetheirownclothes.Doyouhaveanyrulesathome?Doyouhaveanyrulesatschool？Doyourparentsallowyoutodothefollowingthings?Cutinline,eatintheclassroom,droplittereverywhere,speakloudlyinpublic,cheatinexams,sitonspecialseats,askforaleave/copyothers’homework./haveafightwithothersplaycomputergames.haveapart-timejob,gooutwithfriendssmoke/drink/playcards/cookforyourparents/Helpwithhousework/washtheclothesforyourparents/takeparentsthingswithoutpermission/playcomputergamesAsateenager,youhavealotofrulesatyourhomeandyourschool.Canyouwritedownsomeofthem?I’mallowedto…I’mnotallowedto…havesomechangewithme/askforaleaveifI’msickinP.Elesson.haveafightwithothers/copyothers’homework.Doyouagreeordisagree?Why?Teenagersshouldbeallowedtogooutwiththeirfriends.Sixteen-year-oldsshouldbeallowedtodrive.Fifteen-year-oldsshouldbeallowedtochoosetheirownclothes.Parentsshouldallowteenagerstomaketheirowndecisions.Parentsshouldallowsixteen-year-oldstosmoke.Parentsshouldallowfourteen-year-oldstohavepart-timejobs.TheteachershouldallowSixteen-year-oldstochoosetheirownclothes.tochoosetheirownclothes.Sixteen-year-oldsshouldbeallowedsixteen–year-olds=sixteen-year-oldchildrenTheteachershouldallowSixteen-year-oldstohavepart-timejobs.Sixteen-year-oldsshouldbeallowedtohavepart-timejobsTheteachershouldallowSixteen-year-oldstodohomeworkwithfriends.todohomeworkwithfriends.Sixteen-year-oldsshouldbeallowedTheteachershouldallowSixteen-year-oldstoaskforaleavetoaskforaleave.Sixteen-year-oldsshouldbeallowedshould+be+过去分词Whatschoolrulesaretheybreaking?tosmoke.Theteachershouldnotallowstudentstosmoke.shouldnotbeallowedTheteachershouldnotallowboystohavelonghair.shouldnotbeallowedStudentsBoystohavelonghair.shouldnotbeallowedTheteachershouldnotallowtoSixteen-year-oldsgettheirearspierced.Sixteen-year-oldstogettheirearspiercedtheteachershouldnotallowstudentstohavepart-timejobs.shouldnotbeallowedStudentstohavepart-timejobs.shouldnotbeallowedSixteen-year-oldstodrive.TheteachershouldnotallowSixteen-year-oldstodrive.can/may/must/should(not)+be+过去分词Shouldnot+be+过去分词ListenandcircleTfortrueorFforfalse.1b1.Annacangototheshoppingcenterbybus.2.Annawantstogetherearspierced.3.Annawantstochooseherownclothes.TFTFTFStudentsshouldnotbeallowedtotakemobilephonestoschool.Doyouagreeordisagree?Studentsshouldbeallowedtodohomeworkwithfriends.Doyouagreeordisagree?Studentsshouldnotbeallowedtohavepart-timejobs.Doyouagreeordisagree?Studentsshouldnotbeallowedtogooutatnight.Doyouagreeordisagree?Studentsshouldnotbeallowedtogettheirearspierced.Doyouagreeordisagree?Makealistofthingsteenagersshouldandshouldnotbeallowedtodo.Discussyourlistwithyourpartner.WhatteenagersshouldbeallowedtodoWhatteenagersshouldnotbeallowedtodosmoke/drink/playcards/cookforyouparents/Helpwithhousework/washtheclothesforparents/takeparentsthingswithoutpermission/playcomputergamesplaycomputergames.haveapart-timejob,gooutwithfriends,askforaleave,haveafightwithothers’copyothers’homeworkA:Ithinksixteen-year-oldsshouldbeallowedtodrive.B:Iagree.Theyaren’tseriousenough.1cA:Ithinkteenagersshouldbeallowedtohavemobilephones?B:No,Idon’tthinkso.Perhapsstudentspaymoreattentiontoshortmessagesthantotheirstudies.B:Yes.It’sconvenientforstudentsandtheirparentstocommunicatewitheachother.Makealistofthingsteenagersshouldandshouldnotbeallowedtodo.Writedownonyournotebook.Homework1.把主动语态的宾语变为被动语态的主语。2.把主动语态的谓语变为被动语态的谓语。3.把主动语态的主语变为被动语态的by短语。（①by短语可以省。②by短语后跟代词的宾格。）bytheteacher.1.Theteacheroftenaskshimquestions.Hequestionsisaskedbymanystudents.2.ManystudentsstudyEnglish.Englishisstudied3.Theymakeshoesinthatfactory.Shoesaremadebytheminthatfactory.1.找宾语----即动作的承受者Theymakeshoesinthatfactory.Shoes2.判断宾语的单复数----即be动词的单复数.aremade3.判断动词的时态----即be动词的时态.4.修改谓语的形式----即原句动词改为过去分词5.修改原句的主语----即by+宾语（原主语）.bythem.主变宾,宾变主,谓动bedone时不变,人称、数、格随着变was/were+过去分词lastyear.1.Theyboughttencomputerslastterm．bythemlastterm.2.Weplantedmanytreeslastyear.ManytreeswereplantedTencomputerswereboughtcan/may/must/should+be+过去分词1.AmycantakegoodcareofGina．byAmy.Ginacanbetakengoodcareof2.Youshoulddrinkmorewater.Morewatershouldbedrunkbyyou.