人教版高二英语选修7第二单元语法完整1ppt课件

精选,被动语态和动词不定式的被动语态,Unit2Grammar,精选,DiscoveringusefulstructuresGooverthepassivevoiceMyhamburgerwaseatenbythedog.Anewhospitalwillbebuiltinourcity.,精选,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,精选,一般过去时：was/were+p.pThesecomputersweremadeinourowncountry.一般将来时：will/shallbe+p.pShallwebeaskedtoattendtheopeningceremony?,精选,过去将来时：wouldbe+p.pThenewswouldbesenttothesoldiersmotherassoonasitarrived.,现在进行时：am/is/arebeing+p.pTreesarebeingplantedovertherebythem.,精选,过去进行时：was/werebeing+p.pThefeastwasbeingpreparedwhenthebirdsarrivedinthesky.现在完成时：have/hasbeen+p.pSwiftprogresshasalsobeenmadeincultureandeducation.,精选,过去完成时：hadbeen+p.pThehugebridgehadbeendamagedbeforetheWorldWarII.将来完成时：will/shallhavebeen+p.pThebookwillhavebeenpublishedbytheendofnextmonth.,精选,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。,精选,二、动词不定式的被动语态一般时tobedone完成时tohavebeendoneIperfertobeleftathomeratherthangoshopping.Theriverisreportedtohavebeenpolluted.,精选,1.Thedishesneed,2.Themailneedsrightaway.,wash,send,tobewashed.,tobesent,精选,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).,精选,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.,精选,3.在“tootodo;enoughto”结构中。如：Theproblemistoodifficulttoworkout(tobeworkedout).Thehouseisbigenoughtolivein.,4.在“with+n.+todo”结构中。Withnothingtodo,helayinbed.Withsomanyexercisestodo,Icantgotothecinema.,精选,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.,精选,用被动语态改换下列各句。,1.Myfatherwillrepairmybikeforme.,Mybikewillberepairedbymyfatherforme.,2.Ihavefoundmywallet.,Mywallethasbeenfound.,3.Shetoldmetowaithereforher.,Iwastoldtowaithereforher.,精选,4.Thepolicewillsurelyarrestthemurderer.,Themurdererwillsurelybearrestedbythepolice.,5.TheyinvitedMr.Greentomakeaspeech.,Mr.Greenwasinvitedtomakeaspeech.,6.Thestudentscleantheirclassroomeveryday.,Theirclassroomiscleanedbythestudentseveryday.,精选,7.Youmustnttakethosebooksoutofthereading-room.,Thosebooksmustntbetakenoutofthereading-room.,8.Ididnttellyouthegirlcoulddothejob.,Youwerenttoldbymethatthegirlcoulddothejob.,9.DopeoplespeakEnglishinyourcountry?,IsEnglishspokeninyourcountry?,精选,10.Hegavemeapresent.,Iwasgivenapresent.,Apresentwasgiventome.,11.Motheroftentellsherchildrenastoryatbedtime.,Childrenareoftentoldastoryatbedtimebymother.,Astoryisoftentoldbymothertochildrenatbedtime.,精选,1.Knives_(use)forcuttingthings.2.Thebuilding_(build)in1987.3.Nuclearenergy_(use)toproduceelectricitybyus.4.Severalbigmodernpowerplants_(build)inourcitynextyear.5.Yourmistakes_(