情态动词及情态动词的被动语态PPT课件

-,1,含情态动词的被动语态,-,2,情态动词有哪些?,can/may/must/will/shall/should/oughttoneed/darehadbetter/wouldrather,usedto/haveto/beableto,-,3,情态动词的含义,1.能力2.请求/准许3.可能性,1.请求/准许2.可能性*3.祝愿,1.义务(必须);2.猜测(肯定),需要,敢,愿意,1.征求意见2“应该”(should),-,4,“能够”（能力）,“不得不/必须”,“应该”,“过去（常常）”,“最好”,“宁愿”,情态动词的含义,-,5,can/couldbedonemustbedoneshouldbedonemay/mightbedonehadbetterbedonehavetobedone,含情态动词的被动语态：情态动词+be+PP,-,6,否定式：情态动词+not+be+p.p,can/couldnotbedonemustnotbedoneshouldnotbedonemay/mightnotbedonehadbetternotbedonehavenottobedone,-,7,疑问式：情态动词+主语+be+p.p,can/could+主语+bedonemust+主语+bedoneshould+主语+bedonemay/might+主语+bedonehad+主语+betterbedonehave+主语+tobedone,-,8,1.Icanfinishthework.Theworkcanbefinishedbyme.Cantheworkbefinishedbyyou?,2.Weshouldplantmanymoretrees.,Manymoretreesshouldbeplantedbyus.,Shouldmanymoretreesbeplantedbyus?,-,9,Teenagersshouldbeallowedbyparentstodrivethecar.,3.Parentsshouldallowteenagerstodrivethecar.,Shouldteenagersbeallowedbyparentstodrivethecar?,4.Youcanpasstheexamifyoustudyhard.,Theexamcanbepassed(byyou)ifyoustudyhard.,Cantheexambepassed(byyou)ifyoustudyhard?,-,10,water(浇水),Treesmustbewateredbythemeveryday.,Theymustwatertreeseveryday.,Musttreesbewateredbythemeveryday?,-,11,Peoplemaycatchfishintheriver.,Fishmaybecaughtintheriver(bypeople).,Practice:,-,12,1.Mymothercancookdeliciousmeals.Deliciousmealscanbecookedbymymother.2.Studentswillusethesetextbooksnextterm.Thesetextbookswillbeusednexttermbystudents.,3.Youshouldwatertreesoften.,Treesshouldbewateredbyyouoften.,4.Youmustnotplanttreesinverydryearth.,Treesmustnotbeplantedbyyouinverydryearth.,-,13,3.Sixteen-year-oldsshouldbeallowedtodrive.(先改为否定句，再改一般疑问句),Shouldsixteen-year-oldsbeallowedtodrive?,Sixteen-year-oldsshouldntbeallowedtodrive.,Yestheyshould./No,theyshouldnt.,4.Ithinktheworkshouldbedoneatonce.(改为否定句),Idontthinktheworkshouldbedoneatonce.,-,14,Drills:,1.Weshouldlookafterelderpeopleverywell.2.Weshouldanswerthesequestionsassoonaspossible.3.Wemustcleanourclassroomthisafternoon.4.Youmusthandinyourhomeworkbeforenineoclock.5.Youcanbringyourfriendstomybirthdaypartytomor