人教版高二英语选修7第二单元语法ppt课件

.,被动语态和动词不定式的被动语态,Unit2Grammar,.,DiscoveringusefulstructuresGooverthepassivevoiceMyhamburgerwaseatenbythedog.Anewhospitalwillbebuiltinourcity.,.,被动语态由be+过去分词构成，be随时态的变化而变化。一般现在时：am/is/are+P.PTheclassroomiscleaned.,一、被动语态的构成,.,一般过去时：was/were+p.pThesecomputersweremadeinourowncountry.一般将来时：will/shallbe+p.pShallwebeaskedtoattendtheopeningceremony?,.,过去将来时：wouldbe+p.pThenewswouldbesenttothesoldiersmotherassoonasitarrived.,现在进行时：am/is/arebeing+p.pTreesarebeingplantedovertherebythem.,.,过去进行时：was/werebeing+p.pThefeastwasbeingpreparedwhenthebirdsarrivedinthesky.现在完成时：have/hasbeen+p.pSwiftprogresshasalsobeenmadeincultureandeducation.,.,过去完成时：hadbeen+p.pThehugebridgehadbeendamagedbeforetheWorldWarII.将来完成时：will/shallhavebeen+p.pThebookwillhavebeenpublishedbytheendofnextmonth.,.,含有情态动词的动词变成被动语态：情态动词+be+过去分词,Thisproblemcanbesolved.这问题可解决。Whatsdonecannotbeundone.覆水难收。,.,二、动词不定式的被动语态一般时tobedone完成时tohavebeendoneIperfertobeleftathomeratherthangoshopping.Theriverisreportedtohavebeenpolluted.,.,1.Thedishesneed,2.Themailneedsrightaway.,wash,send,tobewashed.,tobesent,.,三、不定式的主动形式表示被动,1.在therebe结构中。Thereisalotofhomeworktodo.(也可用tobedone),Thereisnotimetolose(tobelost).,.,2.在“n+be+adj.+todo”结构中。常用的形容词有easy，difficult，hard，impossible，nice，pleasant，light，heavy，interesting，important，expensive，cheap，fit，dangerous等。,Heishardtoconvince.,.,3.在“tootodo;enoughto”结构中。如：Theproblemistoodifficulttoworkout(tobeworkedout).Thehouseisbigenoughtolivein.,4.在“with+n.+todo”结构中。Withnothingtodo,helayinbed.Withsomanyexercisestodo,Icantgotothecinema.,.,5.一些作表语用的不定式的主动形式。常见的这类动词有let(出租),rent，hire,blame等。Thehouseistolet.IfeltIwastoblame.,.,用被动语态改换下列各句。,1.Myfatherwillrepairmybikeforme.,Mybikewillberepairedbymyfatherforme.,2.Ihavefoundmywallet.,Mywallethasbeenfound.,3.Shetoldmetowaithereforher.,Iwastoldtowaithereforher.,.,4.Thepolicewillsurelyarrestthemurderer.,Themurdererwillsurelybearrestedbythepolice.,5.TheyinvitedMr.Greentomakeaspeech.,Mr.Greenwasinvitedtomakeaspeech.,6.Thestudentscleantheirclassroomeveryday.,Theirclassroomiscleanedbythestudentseveryday.,.,7.Youmustnttakethosebooksoutofthereading-room.,Thosebooksmustntbetakenoutofthereading-room.,8.Ididnttellyouthegirlcoulddothejob.,Youwerenttoldbymethatthegirlcoulddothejob.,9.DopeoplespeakEnglishinyourcountry?,IsEnglishspokeninyourcountry?,.,10.Hegavemeapresent.,Iwasgivenapresent.,Apresentwasgiventome.,11.Motheroftentellsherchildrenastoryatbedtime.,Childrenareoftentoldastoryatbedtimebymother.,Astoryisoftentoldbymothertochildrenatbedtime.,.,1.Knives_(use)forcuttingthings.2.Thebuilding_(build)in1987.3.Nuclearenergy_(use)toproduceelectricitybyus.4.Severalbigmodernpowerplants_(build)inourcitynextyear.5.Yourmistakes_(