英语人教版九年级全册umit3.ppt

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1、Unit3Teenagersshouldbeallowedtochoosetheirownclothes.Period1SectionA1a-2c1执照，许可证2全神贯注，专心于3机会，时机4代替，而不是5自愿，志愿者6会员，成员7经历，体验8地方的，当地的9设计，构思10刺穿，刺破11愚蠢的，傻的12不睡觉，熬夜license(licence)concentrateonopportunityinsteadofvolunteermemberexperiencelocaldesignpiercesillystayupSomeusefulexpressions:1s

2、ixteen-year-olds2getone’searspierced3beallowedtodosth.4driver’slicense5workatnight6cutone’shair7stoptodosth./doingsth.8seemtodosth.9onweekends10atthatage11insteadof12dohomeworkwithfriends13onschoolnights14goshopping15onFridaynights16goout17cleanup18stayupSomeimportantsentences:Ithink

3、studentsshouldbeallowedtodohome-workwithfriends.Idisagree.Theytalkinsteadofdoinghomework.Sixteen-year-oldsshouldnotbeallowedtodrive.Iagree.Theyaren’tseriousenoughatthatage.Doyouthinksixteen-year-oldsshouldbeallowedtochoosetheirownclothes?Yes,Ido./No,Idon’t.Iwanttoplaywithmyfriends.Bu

4、tmyfatherdoesn’tallow.Ithinkteenagersshouldbeallowedtogoouttoplaywiththeirfriends.Parentsshouldallowteenagerstogooutwiththeirfriends.Parentsshouldallowsix-year-oldstodrive.Parentsshouldallowfifteen-year-oldstochoosetheirownclothes.Teenagersshouldbeallowedtogooutwiththeirfriends.Sixte

5、en-year-oldsshouldbeallowedtodrive.Fifteen-year-oldsshouldbeallowedtochoosetheirownclothes.grammar被动语态定义:表示主语是动作的承受者.构成:助动词be+及物动词的过去分词。助动词有人称、时态和数的变化。含有情态动词的被动语态：情态动词＋be＋及物动词的过去分词。用法：当我们不知道谁是动作的执行者，或者没有必要指出谁是动作的执行者，或者只强调动作的承受者时，要用被动语态。1.规则动词的过去分词：1)一般情况在动词原形后加-edwatch---watched2)以不发

6、音e结尾的加-dpractice---practiced3)以辅音加y结尾的，去y变i加-edstudy---studied4)以重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加-edstop---stopped2.不规则动词的过去分词：amisarebeenhavehashaddodonewritewrittengogoneexercise同义句转换Theyshouldallowustohavepart-timejobs.____________________________.Weshouldallowchildrentospendtimewit

7、htheirfriends._____________________________________.TheteachershouldallowAnnatofinishthepicture._____________________________________.Parentsshouldallowchildrentochoosetheirownfriends._____________________________________.Thetelephone___________(invent)byBellin1876.Thetreesmay_______

8、_____(plant)