情態(tài)動詞及情態(tài)動詞的被動語態(tài)

情態(tài)動詞有哪些?can/may/must/will/shall/should/oughttoneed/darehadbetter/wouldrather,usedto/ haveto/beableto第一頁1第二頁，共14頁。情態(tài)動詞的含義序號原形過去式主要含義1cancould2maymight3mustmusthadto4needneeded5daredared6willwould7shallshould1.能力2.請求/準許3.可能性1.請求/準許2.可能性*3.祝愿1.義務(必須);2.猜測(肯定)需要敢愿意1.征求意見2“應該”(should)第二頁2第三頁，共14頁。序號原形過去式主要用法8beabletowas/wereableto9havetohadto10oughttooughtto11usedto12hadbetter13wouldrather“能夠”（能力）“不得不/必須”“應該”“過去（常常）”“最好”“寧愿”情態(tài)動詞的含義第三頁3第四頁，共14頁。

can/couldbedone

mustbedone

shouldbedone

may/mightbedonehadbetterbedone

havetobedone含情態(tài)動詞的被動語態(tài)：情態(tài)動詞+be+PP第四頁第五頁，共14頁。否定式：情態(tài)動詞+not+be+p.p

can/couldnotbedone

mustnotbedone

shouldnotbedone

may/mightnotbedonehadbetternotbedone

havenottobedone第五頁第六頁，共14頁。疑問式：情態(tài)動詞+主語+be+p.p

can/could+主語+bedone

must

+主語+bedone

should+主語+bedone

may/might

+主語+bedonehad+主語+betterbedone

have+主語+tobedone第六頁第七頁，共14頁。1.Icanfinishthework.Theworkcanbefinishedbyme.Cantheworkbefinishedbyyou?2.We

shouldplantmanymoretrees.Manymoretreesshouldbeplantedbyus.

Shouldmanymoretreesbeplantedbyus?第七頁第八頁，共14頁。Teenagers

shouldbe

allowedbyparentstodrivethecar.3.Parentsshouldallowteenagerstodrivethecar.Shouldteenagers

be

allowedbyparentstodrivethecar?4.Youcanpasstheexam

ifyoustudyhard.Theexamcanbepassed(byyou)ifyoustudyhard.Cantheexambepassed(byyou)ifyoustudyhard?第八頁第九頁，共14頁。water(澆水)Treesmustbewatered

bythemeveryday.Theymustwatertreeseveryday.Musttreesbewatered

bythemeveryday?第九頁第十頁，共14頁。Peoplemaycatchfishintheriver.Fishmaybecaughtintheriver(bypeople).Practice:第十頁第十一頁，共14頁。1.Mymother

cancookdeliciousmeals.

Deliciousmealscanbecookedbymymother.2.Students

willuse

thesetextbooksnextterm.Thesetextbooks

willbeusednexttermbystudents.3.Youshouldwatertreesoften.Treesshouldbewateredbyyouoften.4.Youmustnotplanttreesinverydryearth.Treesmustnotbeplantedbyyouinverydryearth.第十一頁第十二頁，共14頁。3.Sixteen-year-oldsshouldbeallowedtodrive.(先改為否定句，再改一般疑問句)

Shouldsixteen-year-oldsbeallowedtodrive?Sixteen-year-oldsshouldn’tbeallowedtodrive.Yestheyshould./No,theyshouldn’t