一般现在时的被动语态:amam／／isis／／aredonearedone一般过去时一般过去时的被动语态::waswas／／weredoneweredone一般将来时一般将来时的被动语态::willwill／／shallbeshallbe＋＋donedone现在完成时现在完成时的被动语态:BasketballBasketballisplayedisplayedbypeopleallovertheworld.bypeopleallovertheworld.ApartyApartywasheldwasheld(bythem)lastSunday.(bythem)lastSunday.YouwillbefinedifyougowrongYouwillbefinedifyougowronghave/has+been+donehave/has+been+doneThebridgehasbeenbuiltfortwoyears.Thebridgehasbeenbuiltfortwoyears.mustthrowshouldcookshouldcookRubbish__________Rubbish______________________________________________intothebin.intothebin.Food_________________Food_________________beforeeating.beforeeating.mustmustbebethrownthrownshouldbeshouldbecookedcookedTheclassroomTheclassroomshouldbeshouldbecleanedcleanedTheexitmaybestuckmaystickmaystick((粘贴粘贴))________________________onthesidedoor.________________________everyday.shouldcleanshouldcleanRULE1RULE1Weuse‘____________________’+pastparticipletoformthepassivevoicewithmodalverbs（情态动词）.modalverbs+bePassivevoicewithmodalverbs(can,may,Passivevoicewithmodalverbs(can,may,mustandshould)mustandshould)SubjectSubjectModalverbModalverbPastPastparticiplparticiplIICan(may,must,should)Can(may,must,should)bebehelpedhelpedYou/We/You/We/TheyTheyCan(may,must,should)Can(may,must,should)bebee.g.Theworkcanbefinishedinanhour.含有情态动词的被动语态结构为：含有情态动词的被动语态结构为：肯定式肯定式：：主语主语+can/may/must+can/may/must++bebe＋动过分＋动过分否定式否定式：：主语主语+can/may/must++can/may/must+notbe+notbe+动过分动过分一般疑问句结构一般疑问句结构：：Can/May/MustCan/May/Must++主语主语+be++be+动过分动过分??树木已经被砍伐了（树木已经被砍伐了（cutdown)cutdown)________________________________________________河水已经被污染了（河水已经被污染了（pollute)pollute)______________________________________________Treeshavebeencutdown.Treeshavebeencutdown.WaterintheriverhasbeenWaterintheriverhasbeenpolluted.polluted.米饭已经做好了米饭已经做好...
