情态动词的被动语态

情态动词被动语态课件Unit7Teenagersshouldbeallowedtochoosetheirownclothes.SectionAGrammarFocusGrammarFocusIdon’tthinksixteen-year-oldsshouldbeallowedtodrive.Iagree.Theyaren’tserious

enough.Doyouthinkteenagersshouldbeencouragedtomaketheirowndecisions?

Teenagersshouldnotbeallowedtohavepart-timejobs.No,Idon’tagreewiththis.Teenagersaretooyoungtomaketheirowndecisions.

Idisagree.Theycanlearnalotfromworking.

Ifyoudon’tuseaflash,thenitmaybeOK.Doyouthinkwemaybeallowedtotakephotosifwedon’tuseaflash?

1.含情态动词should的被动语态结构式：

should+be+及物动词的过去分词。

(1)肯定句结构为：主语+shouldbe+及物动词的过去分词+(by+宾语）.

eg:你应该自己完成作业。

Yourhomeworkshouldbefinishedbyyourself.

(2)否定结构为：主语+should+not+be+及物动词的过去分词+(by+宾语).

eg：不应该允许青少年晚上外出。

Teenagersshouldnotbeallowedtogooutatnight.语法焦点含情态动词should的被动语态1.含情态动词should的被动语态结构式：

(3)一般疑问句结构为:Should+主语+be+及物动词的过去分词+(by+宾语)？回答:Yes，主语+should./No，主语+shouldn’t.

eg:这些小树应该每天浇水吗？

Shouldtheseyoungtreesbewateredeveryday?

Yes,theyshould./No,theyshouldn’t.对，应该。/不，不应该。

(4)特殊疑问句结构为:疑问词+should+主语+be+动词的过去分词+(by+宾语)

？

eg：应该允许学生们做什么？

Whatshouldstudentsbeallowedtodo?语法焦点含情态动词should的被动语态结构:肯定：情态动词+be+动词的过去分词否定：情态动词+not+be+动词的过去分词一般疑问句：情态动词+主语+be+动词的过去分词？特殊疑问句：疑问词+情态动词+主语+be+动词的过去分词？情态动词的被动语态WeshouldallowteenagerstowatchTVontheweekend.Studentsmayusethecomputershere.Youmustwatertheflowernow.Hecanfixthecomputer.1.Nobodycananswerthequestion.(同义句改写）→Thequestion＿＿＿＿answeredbyanybody.2.Weshouldcleanourteethtwiceaday.(改为被动语态）→Ourteethshould＿＿＿＿＿twiceaday.3.Theyshouldbeallowedtotakepartinafter-schoolactivities.(变一般疑问句并作否定回答）→＿＿＿＿they＿＿＿＿＿＿＿takepartinafterschoolactivities?

No,they＿＿＿＿＿.一、按要求进行句型转换，每空一词。can’tbe强化训练becleanedShouldbeallowedtoshouldn’t4.Youcan’tlendthemagazinetoothers.(改为被动语态）→Thebook＿＿＿＿＿＿toothers.5.Thelightsshouldbeturnedoffbeforeyouleavetheclassroom.(改为主动语态）→You＿＿＿＿＿＿offthelightsbeforeyouleavetheclassroom.一、按要求进行句型转换，每空一词。can’tbelent强化训练shouldturnNomatterhowmanydifficultieswehave,Ibelieveallproblemscan_____________(solve)intheend.2.Mobilephonesshould___________(keep)offduringthemeeting.3.Teenagersundereighteenmust__________________(notallow)tosmokeordrink.4.Manyparentsthinkgoingtoschoolmust___________(put)first,soteenagersshould_____________________(notencourage)toworkpart-time.

Completethesentencesusingthecorrectformsofthewordsinbrackets.besolvedbekeptnotbeallowedbeputnotbeencouragedYoumustcleanyourbedroomeveryday.Yourbedroommustbecleanedeveryday.2.Parentsshouldencourageteenagerstodosocialworkfortheircommunity.Teenagers__________________________________________________________.3.CanLucydoherhomeworktomorrowinstead?Can__________________________________________shouldbeencouragedherhomeworkbedonetomorrowinstead?

4aRewritethesentencesaccordingtotheexample.todosocialworkfortheircommunity.4.DoyouthinkwemustkeepteenagersawayfromtheInternet?Doyouthinkteenagers_______________________________________?5.Parentsshouldgiveteenagerschancestomaketheirowndecisions.Teenagers_____________________________________________.mustbekeptawayfromshouldbegivenchancestomaketheirowndecisionstheInternet4bFillintheblankswiththecorrectformsofthewordsinbrackets.

Shouldteenagers___________(ask)tomoveoutwhentheystartworking?InmanyWesterncountries,teenagers___________(allow)tomoveoutateighteen.Theirparentsbelievethattheyshould___________(educate)totakecareofthemselvesfromayoungage.Thisway,whenthey_______(start)workingtheycanmanagetheirownlives.However,inmostAsiansocieties,itisnotcommonforteenagerstobeaskedareallowedbeeducatedstart_________(move)out.Chineseparentsbelievethatitisbetterforchildrentolive