新概念英语第二册语法总结：被动语态何时运用被动语态：（1）强调动作的接受者：AmericawasdiscoveredbyColumbus.（2）不知谁是动作的执行者：Youarewantedonthephone.（3）作客观说明：Itissaidthatthemeetinghasbeenputoff.（经典句型）主动变被动的基本方法：（说起来容易，掌握起来需要用心！）（1）主动语态中的宾语变为被动语态的主语。（2）谓语动词变为由“be+过去分词”的形式，配合时态作相应变化。（3）主动语态主语置于介词by之后，如无必需，则省略。（4）不及物动词没有被动语态。现在do(does)→am/is/are+doneWekeepthepianointheliving-room.→Thepianoiskeptintheliving-room.过去did→was/were+doneTheybuiltthebridgein1980.→Thebridgewasbuiltin1980.将来will/shalldo→will/shall+be+doneHewillreadthebooktomorrow.→Thebookwillbereadtomorrow.现在完成have/hasdone→have/has+been+doneWehavedeliveredthenewspaper.→Thenewspapershavebeendelivered(byus).过去完成haddone→hadbeendoneShehadseenthefilmbeforeshecamehere.→Thefilmhadbeenseenbeforeshecamehere.将来完成will/shallhavedone→will/shallhave+been+doneBytheendofthistermweshallhavefinished80texts.→Bytheendofthisterm80textswillhavebeenfinished.现在进行am/is/aredoing→am/is/are+being+doneTheyaredrawingthepicture.→Thepictureisbeingdrawnbythem.过去进行was/weredoing→was/were+being+doneHewasreviewingtheirlessonsatthismomentyesterday.→Theirlessonswerebeingreviewedatthismomentyesterday.情态动词maymaycancanmustmustshoulddo→should+be+doneoughttooughttousedtousedtoYoumustwriteanarticleonthesubject.→Anarticlemustbewrittenonthesubject.测试精编1.Sincethefirstspacemission,manycommunicationsatellites________.A.waslaunchedB.arelaunchedC.havebeenlaunchedD.hadbeenlaunched2.Whatkindofadvice________you?A.hasgaveB.wasgaveC.hadbeengiventoD.hasgiven3.Theslave________frommorningtillnight.A.madetoworkB.wasmadeworkingC.wasmadeworkedD.wasmadetowork4.Theconstructionofthelaboratory________bytheendofJuly.A.mustbecompletingB.mustcompleteC.musthavecompletedD.musthavebeencompleted5.Yourproposal________bythecommitteesoon.A.isdiscussedB.hasbeendiscussedC.isgoingtobediscussedD.willhavebeendiscussed（后设答案，大家不要偷看哦~(*^__^*)嘻嘻……）KEYS1.C2.C3.D4.D5.C
