Unit+7+Section+A+4a-4c 人教版九年级英语全册.pptxVIP

（人教新目标版）九年级全Period3SectionA4a-4cUnit7Teenagersshouldbeallowedtochoosetheirownclothes.

LearningobjectivesKeywordsphrases：community，chance，educate，manage，societymakeonesowndecisionKeysentences：1.InmanyWesterncountries，teenagersareallowedtomoveoutateighteen.2.ThatiswhymanyChineseadultscontinuetolivewiththeirparents.Keystructure：modelverbs＋be＋pastparticipleeg：Yourbedroommustbecleanedeveryday.

Teenagersshouldbeencouragedtodosocialworkfortheircommunity.Doyouagreeordisagree?communityn.社区；社团Leadin

Teenagersshouldnotbegivenchancestomaketheirowndecisions.Doyouagreeordisagree?chancen.机会；可能性makeonesowndecision自己做决定Leadin

Themobilephonemustbekeptawayfromteenagers?Doyouagreeordisagree?keep...awayfrom避免接近；远离Leadin

Teenagerscouldbeeducatedtomanagetheirownlives.Doyouagreeordisagree?educatev.教育；教导managev.完成；应付Leadin

Readthesentencesagainandpayattentiontotheunderlinedstructures.带有情态动词的被动语态结构：情态动词+be+V-ed1.Teenagersshouldbeencouragedtodosocialworkfortheircommunity.2.Teenagersshouldnotbegivenchancestomaketheirowndecisions.3.Themobilephonemustbekeptawayfromteenagers?4.Teenagerscouldbeeducatedtomanagetheirownlives.Presentation

主动语态变被动语态的方法Edisonthelightbulb.inventedThelightbulb主语+谓语动词被动语态(be+V-ed)+介词+宾语①主动语态的宾语变成被动语态的主语。wasinventedbyEdison.②主动语态的谓语动词变成“was/were+及物V-ed”形式。③主动语态的主语变成by引导的介词短语放在主谓结构后面，有时可以省略。Presentation

③主动语态的主语变成by引导的介词短语放在主谓结构后面，有时可以省略。主语谓语动词被动语态(情态V+be+V-ed)介词+宾语LiMingshoulddoit.ItshouldbedonebyLiMing.主语谓语动词主动语态(含情态动词)宾语I.含情态动词的主动语态变被动语态的方法①主动语态的宾语变成被动语态的主语。②主动语态的谓语动词变成情态动词+be+V-ed形式。Presentation

II.含情态动词被动语态的几种句型：1.肯定句:主语+情态动词+be+V-ed.Hisbedroomshouldbecleanedinthemorning.2.否定句:主语+情态动词+not+be+V-ed.3.一般疑问句:情态动词+主语