語法學習含情態動詞的被動語態語法學習含情態動詞的被動語態含情態動詞的被動語態常用的情態動詞有：can,could(能；會),may;might(可以)must(必須),should(應該),would(愿意)haveto(必須；不得不),hadbetter(最好做)含情態動詞的被動語態常用的情態動詞有：can,could主動句變被動句的步驟與其它情況相同。1.WeshouldallowteenagerstowatchTVonSunday.

TeenagersshouldbeallowedtowatchTVonSunday(byus).2.Mymothercancookdeliciousmeals.Deliciousmealscanbecooked(bymymother).主動句變被動句的步驟與其它情況相同。1.Weshould3.Peoplemaycatchfishintheriver.Fishmaybecaughtintheriver(bypeople).

4.wemustkeepteenagersawayfromtheInternet?TeenagersmustbekeptawayfromtheInternet.3.Peoplemaycatchfishinth

can/couldmustshouldmay/mighthadbetterhaveto

情態動詞+be+過去分詞bedone結構can/couldbedone結構1.Theflowers___often.A.mustbewaterB.mustbewateredC.mustwateredD.mustwater2.Thebooksmay___fortwoweeks.A.bekeptB.beborrowedC.keepD.borrow3Thebrokenbike____herebyMrSmith.A.canmendB.canmendedC.canbemendD.canbemended4.Youngtreesshould________everyyear.A.beplanted B.planted C.plantD.areplanted1.Theflowers___often.1.Yourhomeworkshouldbefinishedfirst.Yourhomeworkshouldn'tbefinishedfirst.Shouldyourhomeworkbefinishedfirst?2.Thismagazinecanbetakenhome.Thismagazinecan'tbetakenhome.Canthismagazinebetakenhome?1.Yourhomeworkshouldbefini3.Trees

mustbewatered

everyday.Trees

mustn'tbewatered

everyday.

Must

trees

bewatered

everyday?

3.Treesmustbewateredevery情態動詞+not+be+過去分詞

can/couldmustshouldmay/mighthadbetternotbedone否定式情態動詞+not+be+過去分詞can/could情態動詞+主語+be+過去分詞

Can/CouldMustShouldMay+主語bedone？一般疑問式情態動詞+主語+be+過去分詞Can/Could+疑問詞+情態動詞+主語+be+過去分詞

can/couldmustshouldmay/might+主語bedone？疑問詞特殊疑問式Whenmustthistaskbefinished?

這項任務必須在什么時候完成？疑問詞+情態動詞+主語+be+過去分詞can/co含情態動詞的被動語態肯定句:主語+情態動詞+be+動詞過去分詞.否定句:主語+情態動詞+not+be+動詞過去分詞.一般疑問句:情態動詞+主語+be+動詞過去分詞?特殊疑問句：特殊疑問詞+情態動詞+主語+be+過去分詞？含情態動詞的被動語態肯定句:主語+情態動詞+be+動4aRewritethesentencesaccordingtotheexample.1.Youmustcleanyourbedroomeveryday.Yourbedroommustbecleanedeveryday.

2.Parentsshouldencourageteenagerstodosocialworkfortheircommunity.

Teenagers_________________________________________________________________.3.CanLucydoherhomeworktomorrowinstead?Can_________________________________

_____________________________________?shouldbeencouraged(bytheirparents)todosocialworkfortheircommunitythehomeworkbedone(byLucy)tomorrowinsteadn.

社區，社團4aRewritethesentencesaccor4.Doyouthinkwemustkeepteenagers

awayfromtheInternet?Doyouthinkteenagers____________________________________?5.Parentsshouldgiveteenagerschancesto

maketheirowndecisions.

Teenagers____________________________________

____________________________________mustbekeptawayfromtheInternetshouldbegivenchancestomaketheirowndecisions.keep…awayfrom避免接近，遠離n.

機會，可能性自己做決定4.DoyouthinkwemustkeeptShouldteenagers_______(ask)tomoveoutwhentheystartworking?InmanyWesterncountries,teenagers____________(allow)tomoveoutateighteen.Theirparentsbelievethattheyshould____________(educate)totakecareofthemselvesfromayoungage.Thisway,whenthey______(start)workingtheycanmanagetheirownlives.4b

Fillintheblankswiththecorrectformsofthewordsinbrackets.beaskedareallowedbeeducatedstartv.

教育；教導v.

完成；應付Shouldteenagers_______(ask)However,inmostAsiansocieties,itisnotcommonforteenagersto_____(move)out.Chineseparentsbelievethatitisbetterforchildrentolivewithparentswhocan_____(take)careofthem.Buttheyoungshouldthenlookaftert