九年级英语Unit+7含情态动词的被动语态15张.ppt

语法学习,含情态动词的被动语态,含情态动词的被动语态,常用的情态动词有：,can,could(能；会),may;might(可以)must(必须),should(应该),will;would(愿意)haveto(必须；不得不),hadbetter(最好做),can/couldmustshouldmay/mighthadbetterhaveto,情态动词+be+过去分词,bedone,结构,情态动词+not+be+过去分词,can/couldmustshouldmay/mighthadbetter,notbedone,否定式,情态动词+主语+be+过去分词,Can/CouldMustShouldMay,+主语bedone？,一般疑问式,疑问词+情态动词+主语+be+过去分词,can/couldmustshouldmay/might,+主语bedone？,疑问词,特殊疑问式,主动句变被动句的步骤与其它情况相同。,WeshouldallowteenagerstowatchTVonSunday.,TeenagersshouldbeallowedtowatchTVonSunday(byus).,Peoplemaycatchfishintheriver.,Fishmaybecaughtintheriver(bypeople).,1.Mymothercancookdeliciousmeals.Deliciousmealscanbecookedbymymother.2.Studentswillusethesetextbooksnextterm.Thesetextbookswillbeusednextterm.,3.Youshouldwatertreesoften.,Treesshouldbewateredoften.,4.Youmustnotplanttreesinverydryearth.,Treesmustnotbeplantedinverydryearth.,1.Icanfinishthework.Theworkcanbefinishedbyme.一般问句：Cantheworkbefinishedbyyou?,2.Weshouldplantmanymoretrees.,Manymoretreesshouldbeplantedbyus.,一般问句：Shouldmanymoretreesbeplantedbyus?,Teenagersshouldbeallowedtodrivethecar.,3.Parentsshouldallowteenagerstodrivethecar.,一般问句：Shouldteenagersbeallowedtodrivethecar?,Treesmustbewateredeveryday.,4.Theymustwatertreeseveryday.,一般问句：Musttreesbewateredeveryday?,Sixteen-year-oldsshouldbeallowedtodrive.(改为否定句),Sixteen-year-oldsshouldntbeallowedtodrive.,Ithinktheworkshouldbedoneatonce.(改为否定句),Idontthinktheworkshouldbedoneatonce.,1.Theflowers_often.A.mustbewaterB.mustbewateredC.mustwateredD.mustwater2.Thebooksmay_fortwoweeks.A.bekeptB.beborrowedC.keepD.borrow3Thebrokenbike_herebyMrSmith.A.canmendB.canmendedC.canbemendD.canbemended4.Youngtre