情態(tài)動詞的被動語態(tài)

語法學習含情態(tài)動詞的被動語態(tài)1.Teenagersshouldbeallowedtogoout.2.16-year-oldsshouldbeallowedtodrive.3.16-year-oldsshouldbeallowedtogettheirearspierced.4.16-year-oldsshouldbeallowedtochoosetheirownclothes.含情態(tài)動詞的被動語態(tài)常用的情態(tài)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)

can/couldmustshouldmay/mighthadbetterhaveto

情態(tài)動詞+be+過去分詞bedone結構情態(tài)動詞+not+be+過去分詞

can/couldmustshouldmay/mighthadbetternotbedone否定式情態(tài)動詞+主語+be+過去分詞

Can/CouldMustShouldMay+主語bedone？一般疑問式疑問詞+情態(tài)動詞+主語+be+過去分詞

can/couldmustshouldmay/might+主語bedone？疑問詞特殊疑問式主動句變被動句的步驟與其它情況相同。WeshouldallowteenagerstowatchTVonSunday.

TeenagersshouldbeallowedtowatchTVonSunday(byus).Peoplemaycatchfishintheriver.Fishmaybecaughtintheriver(bypeople).1.Mymother

cancookdeliciousmeals.

Deliciousmealscanbecookedbymymother.2.Students

willuse

thesetextbooksnextterm.Thesetextbooks

willbeusednextterm.3.Youshouldwater

treesoften.Treesshouldbewatered

often

.4.Youmustnotplant

treesinverydryearth.Treesmustnotbeplanted

inverydryearth.1.Icanfinishthework.Theworkcanbefinishedbyme.一般問句：

Cantheworkbefinishedbyyou?2.We

shouldplantmanymoretrees.Manymoretreesshouldbeplantedbyus.一般問句：

Shouldmanymoretreesbeplantedbyus?Teenagers

shouldbe

allowed

todrivethecar.3.Parentsshouldallowteenagerstodrivethecar.一般問句：

Shouldteenagers

be

allowed

todrivethecar?Trees

mustbewatered

everyday.4.Theymustwatertreeseveryday.一般問句：

Musttrees

bewatered

everyday?Sixteen-year-oldsshouldbeallowedtodrive.(改為否定句)Sixteen-year-oldsshouldn’tbeallowedtodrive.Ithinktheworkshouldbedoneatonce.(改為否定句)Idon’tthinktheworkshouldbedoneatonce.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.Foodsafetyisveryimportant.Morerulesshould_______inChina.AmakeBbemakingCbemade2.Teenagers______allowedtodrive.A.shouldnotbeBshouldbenotCnotshouldbe3.It'sdifficulttogettotheothersideoftheriver.ithinkabridge_____overtheriver.AshouldbebuiltBshouldbuiltCwill