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Unit7Teenagersshouldbeallowedtochoosetheirownclothes.Talkwithyourclassmatesaboutyourschoolrulesbyusing“studentsarenotallowedto…”.SchoolrulesDon’tarrivelateforschool.=Studentsarenotallowedtoarrivelateforschool.Don’truninthehallways.Schoolrules=Studentsarenotallowedtoruninthehallways.SchoolrulesDon’teatintheclassroom.=Studentsarenotallowedtoeatintheclassroom.SchoolrulesDon’tlistentomusicintheclassroom.=Studentsarenotallowedtolistentomusicintheclassroom.SchoolrulesDon’tfightwithothers.=Studentsarenotallowedtofightwithothers.Schoolrules=Studentsarenotallowedtocheat.Don’tcheat.SchoolrulesDon’twearlonghair.(boys)=Boysarenotallowedtowearlonghair.Schoolrules=Studentsarenotallowedtosleepinclass.Don’tsleepinclass.Idon’tthinksixteen-year-oldsIagree.Theyaren’tshouldbeallowedtodrive.seriousenough.DoyouthinkteenagersshouldbeNo,Idon’tagreewithencouragedtomaketheirownthis.Teenagersaretoodecisions?youngtomaketheirowndecisions.TeenagersshouldnotbeallowedIdisagree.Theycanlearntohavepart-timejobs.alotfromworking.DoyouthinkwemaybeallowedIfyoudon’tuseaflash,totakesomephotosifwedon’tthenitmaybeOK.useaflash?GrammarFocus一般现在时的被动语态在英语中，动词有两种语态，即主动语态和被动语态。被动语态的基本结构是“助动词be+及物动词的过去分词”，其中助动词be有人称、数和时态的变化,其变化规则与be作为连系动完全一样。1.一般现在时被动语态的各种句式结构肯定式主语+am/is/are+过去分词（+by…)否定式主语+am/is/are+not+过去分词(+by…)疑问式Am/Is/Are+主语+过去分词(+by…)?特殊疑问词+am/is/are+主语+过去分词（+by...)?被动不离“be”“p.p.”,“p.p.”前面助动be。主谓一致莫忘记，am,is,are现在时。2.一般现在时被动语态的基本用法用法示例表示经常性或习惯性发生的被动动作Iamoftenaskedthequestionbymypupils.表示近期正在发生的被动动作ThesedayspeoplearemovedbyateachernamedZhangLili.描述某种常态化的被动的客观事实Thespaceshipismainlycontrolledbycomputer.强调目前存在的针对行为主体人的被限制性动作Youaren’tallowedtotakephotos.3.主动语态变为被动语态的方法They(主语）grow(谓语）tea(宾语）inthesouth-eastofChina.被动语态:主动语态:Tea(主语）isgrown(谓语）bytheminthesouth-eastofChina.句式结构示例肯定句主语+情态动词+be+及物动词的过去分词(+by…)Teenagersshouldbeallowedtogoshopping.否定句主语+情态动词+not+be+及物动词的过去分词(+by…)Thewordcan’tbeusedinthissentence.一般疑问句情态动词+主语+be+及物动词的过去分词(+by…)?Musttheworkbefinishedtoday?特殊疑问句特殊疑问词+被动语态的一般疑问句？Whoshouldbeaskedforhelp?含有情态动词的主动句变为被动句时，谓语动词部分改为“情态动词+be+及物动词的过去分词”。WecanwriteLetterscanbewrittenlettersinEnglish.inEnglishbyus.改为被动语态4aRewritethesentencesaccordingtotheexample.1.Youmustcleanyourbedroomeveryday.Yourbedroommustbecleanedeveryday.2.Parentsshouldencourageteenagerstodosocialworkfortheircommunity.Teenagers__________________________________________________________.shouldbeencouragedtodosocialworkfortheircommunit3.CanLucydoherhomeworktomorrowinstead?Can__________________________________________________________________?Lucy’shomeworkbedonebyhertomorrowinstead4.DoyouthinkwemustkeepteenagersawayfromtheInternet?5.Doyouthinkteenagers_______________6.__________________________?mustbekeptawayfromtheInternet4.5.Parentsshouldgiveteenagerschancestomaketheirowndecisions.5.Teenagers_____________________________6.________________________.shouldbegivenchancestomaketheirowndecisions4bFillintheblankswiththecorrectformsofthewordsinbrackets.Shouldteenagers__________(ask)tomoveoutwhentheystartworking?InmanyWesterncountries,teenagers____________(allow)tomoveoutateighteen.Theirparentsbelievethattheyshould____________(educate)totakecareofthemselvesfromayoungage.Thisway,whenthey_______(start)workingtheycanmanagetheirownlives.However,inmostAsianbeaskedareallowedbeeducatedstartsocieties,itisnotcommonforteenagersto________(move)out.Chineseparentsbelievethatitisbetterforchildrentolivewithparentswhocan_____(take)careofthem.Buttheyoungshouldthenlookaftertheirparentsastheygetolder.ThatiswhymanyChineseadults________(continue)tolivewiththeirparents.movetakecontinue4cYouandyourfriendarestartinganEnglishclub.Makealistofrulesaboutwhatshouldandshouldnotbeallowed.A:Membersshouldbeallowedtousedictionaries.B:Yes,buttheyshouldonlyuseEnglish-Englishdictionaries.ArethereanyotherrulesaboutwhatshouldandwhatshouldnotbeallowedintheEnglishclub?Canyoutellus?Languagepoints1.Doyouthinkteenagersshouldbeencouragedtomaketheirowndecisions?你认为应该鼓励青少年自己做决定吗？2.makeone’sowndecision意为“自己做决定”，相当于makeadecisionforoneself。3.例：Ijustwanttomakemyowndecision.4.我只想能够自己做决定。5.2.Parentsshouldgiveteenagerschancestomaketheirowndecisions.父母应该给青少年自己做决定的机会。chance(asuitabletimeorsituationwhenyouhavetheopportunitytodosth.)可数名词，意为“机会；机遇”，其后可接todosth.或ofsth.。若表示“做某事对某人来说是一次机会”，其后可接forsb.todosth.。例：Inevermissachancetoplayfootball.我从不错过踢球的机会。It’sagoodchanceforyoutomeet.这是一个你们见面的好机会。3.Thisway,whenthey_______(start)workingtheycanmanagetheirownlives.这样，当他们开始工作时，他们能应付他们自己的生活。manage意为“完成(困难的事);应付(困难)局面”，其后可接名词、代词或动词不定式。例：I’mnotsurehowwewillmanageit.我不确信我们将如何完成这件事。Youshouldmanagetofinishtheworkintime.你应该设法及时完成工作。managetodosth.与trytodosth.managetodosth.“设法做成某事”，强调结果。暗含“做成了某事”之意。trytodosth.“尽力做某事”，表示“尽力做，设法做”，强调动作，不表结果。例：Theshirtwasverydirty,buthemanagedtocleanit.这件衬衫很脏，但他设法把它洗干净了。Theboytriedtomovethestonebutfailed.这个男孩试图移动这块石头，但失败了。Ⅰ.单项选择1.Teenagers____allowedtodriveacar.2.A.shouldnotbeB.shouldbenot3.C.notshouldbeD.shouldn’t4.2.Lindasawapenontheroad,soshestopped____itup.5.A.pickB.topick6.C.pickingD.pickedAB3.Yesterdaymysisterhadhercomputer____atthesuperm