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省略为了使讲话和行文简洁，句中某些成分有时可省略。省略可分以下几种情况：1.todo再现时留toHedidn’tcomethoughhepromisedto(come).Iaskedhimtoseethefilm，butheAdidn’twantto.Bdidn’twanttosee.Cdidn’twant.Ddidn’t.•注意：前句谓语为be或完成/过去时态，•再现为tobe或tohave。e.g.----Areyouanengineer?----No,but________.AIwanttobeBIwanttoCIwant.DIwantedtobe.----Hehasn’tfinishedthetaskyet.----Well,__________Aheoughtto.Bheoughttohave.Cheought.Dheoughttohas.--Haveyoucleanedtheclassroom?---No,but_____.A.IamB.IamjustgoingC.IamgoingD.IamjustgoingtoInmyopinion,lifeinthetwenty-firstcenturyismucheasierthan______A.itusedtoB.itisusedtoC.itwasusedtoD.ItusedtobeDD2).todo作表，如前面主语中有实义动词do/did/does，则可略to。Whathewantstodois(to)gohome.3).介词but/except/besides前有动do，后省to。Hecandonothingbutliedownandsleep.2并列句中的省略两个并列分句中，二个分句承前省相同的部分。1)Myfatherisadoctorandmymother(is)anurse.2)Istudyatcollegeandmysister(studies)athighschool.3）Shewaspoorbut(shewas)honest.4）Mothertookitforgrantedthatweshouldapplyourselvestoourstudies.____________________________.爸也如此。5）Motherdidn'ttakeitforgrantedthatweshouldapplyourselvestothegames.____________________________________.爸也不如此。6)—Tomisanhonestworkerandworkshard.—_______________.爸也如此。SSodidDad.So助主另主也NeitherdidDad.Neither助主另主也不SoitiswithDad另主多个情况也•Thepolicefoundthatthehousehadbeenbrokenintoandalotofthingshadbeenstolen.•Oneofthesidesoftheboardshouldbepaintedyellow,•andtheothershouldbepaintedwhite.3vt+（that）宾从+andthat宾从Hetoldme(that)shewasabeautifulgirlandthatshewasclever.•引导主语从句，同位语从句和表语从句的that不能省.4宾语从句中的省略---Doyouthinkitwillrain---1)I’mafraid,think,believe,hope,guess,suppose，expect,imgaineso.--2)---Idon’tbelievethink,imaginesupposeso=Ibelieve(....)not---Iguess,hope,expect,amafraid+not5.缩状从句从连+~ed/~ing/n/adj/介短(1)when/if/unless/asif/once/though/than等引导的状从主语与主句的主语一致时,省状从中主语和beOnce(hewas)ateacher,henowworksinagovernmentoffice.Helooksasif(hewas)anofficial.Workhardwhen(youare)young,oryou’llregret.(2)当从句主语It,谓动有系动be,省it和beif，unless,when，where,whenever+possible/necessaryUnless（itis）necessary，you’dbetternotrefertothedictionary.Fillintheblankswitharticleswhere(itis)necessary.Ifpossible,bringmeapairofgloves.6、情动shouldinsist,order,command,suggest,propose,advise,demand,require,request,ask.that...(should)doIt’snecessary/important/impossible/strange/natural/apity/vital/imperative…that...(should)do7略if引导的虚拟条件句中将had，were，should放句首，略if。1）________itraintomorrow,wewouldhavetoputoffthevisittotheYangpuBridge.A.WereB.ShouldC.WouldD.Will2）.________forthefreetickets,Iwouldnothavegonetothefilmssooften.A.IfitisnotB.WereC.HaditnotbeenD.Iftheywerenot3）I,asyoucanseeit's12:00,wouldbehungrynow_______.AhadIhadenoughbreakfastBHadIenoughbreakfast1.—Who’sgotmymoney?—I_____.A.doB.haveC.amD.got2.Johnmusthavewrittenhisreport,and_____,too.A.PetermustwriteB.PetermustCPetercan'thaveDPetercan't3.—Wasitthenewschoolmasterwhowalkedby?—_____.A.ItmustbethatB.ItmusthavebeenC.ItmustbeDItmusthas4---Whydidn'tyouattendthepartyyesterday?---I______,butIlostyouraddress.(Wrong)A.oughttoB.oughttohaveC.shouldhaveD.wasgoingtoC•5.Whenfirst________tothemarket,theseproducts•enjoyedgreatsuccess.(NMET2004全国卷II)•A.introducingB.introduced•C.introduceD.beingintroduced•6.Themanwefollowedsuddenlystoppedandlookedasif________whetherhewasgoingintherightdirection.•A.seeingB.havingseen•C.tohaveseenD.tosee•7.Generallyspeaking,________accordingtothedirections,thedrughasnosideeffect.•A.whentakingB.whentaken•C.whentotakeD.whentobetakenBDB8.Unless________tospeak,youshouldremainsilentattheconference.A.invitedB.invitingC.beinginvitedD.havinginvited9.Though________money,hisparentsman-agedtosendhimtouniversity.A.lackedB.lackingofC.lackingD.lackedin10.Theresearchissodesignedthatonce_____nothingcanbedonetochangeit.A.beginsB.havingbegunC.beginningD.begunACDADA11.－Afterlivinginavillageforsolong,Kathywon’twanttomovetoabigcity.－Idon’timagine_____.A.soB.tooC.itD.that12、－Iwaswonderingifwecouldgoskiingonweekend.－_____good.•SoundB.SoundedC.SoundingD.Sounds13、－Iremindedyounottoforgettheappointment.－_____.A.SoyoudidB.SoIdonotC.SodidyouD.SodoI14、Georgeofferedabettersuggestiontomethan_____.A.HenrydidtoSmithB.thatofSmith’sC.Michael’sD.whatCharlieofferedtome15、Thestudentsexpected____tobemorereviewingclassesbeforethefinalexams.A.thereB.itC.thatD.one7、______broken,theglasscannotholdwater.AOnceB.AfterC.OnD.Though16、WhatshouldIdowiththispassage?－_____themainideaofeachparagraph.A.FindingoutB.FoundoutC.FindoutDTofindoutAAACSomeofyoumayhavefinishedunitone.______,youcangoontounittwo.A.IfyoumayB.IfyoudoC.IfnotD.IfsoD