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1、八下Unit1语法GrammarInfinitives动词不定式：“to+动词原形”(有时可省略to)，在句中不能做谓语1.作及物动词的宾语。结构：v.+todo此类动词有：want,hope,wish,like,begin,start,forget,remember,need,ask,learn,decide,try,offer,plan,refuse,agree,help,remember,forget2.作宾语补足语。结构：v.+sb.+todo;否定结构：v.+sb.+not+todo此类动词有：ask,tell,like,
2、love,hat,wouldlike,order,teach,want,wish,advise,注意：（1）不定式符号to在使役动词（let/make/have）和感官动词（see/hear/notice/watch/feel/...）后须省略。如：Isawhimfalloffthetree.Thebossmadetheworkersworkallday.（2）help接动词不定式，不定式符号to可省力，也可不省略。3.作目的状语。不定式结构可以放在句首，用逗号与句子隔开，也可以句末，不用逗号。如：Togetthereontime,
3、wesetoutearly.Hegoestheretoenjoythefreshair.4.动词不定式可以和疑问词who(m),which,what,when,how,where(why除外)等连用，构成不定式短语。如：Howtocontrolthepollutionisabigproblem.Idon’tknowwhattodo.语法练习（动词不定式）单项选择。（）1.Ourteacheroftenasksus_______questionsingroups.A.discussB.todiscussC.discussingD.di
4、scussed（）2.Hepromised____hisoldfriendduringhisstayinTianjin.A.seeB.seeingC.sawD.tosee（）3.---Whyareyousoexcitedtoday?---Weweretold_____apicnicthisweekend.A.haveB.tohaveC.havingD.had（）4.---Iamnewhere.---Don’tworry.I’lldowhatIcan____you.A.helpB.tohelpC.inviteD.toinvite（）5
5、.---Ididn’thearyoucomeinjustnow.---That’sgood.Wetried_____anynoise,foryouweresleeping.A.notmakeB.nottomakeC.tomakeD.making.（）6.It’srelaxingtogetclosetonature____thebeauty.A.enjoyB.enjoyedC.toenjoyD.enjoys（）7.Myparents_____stayoutlateatnight.A.don’tallowmetoB.allowmenot
6、toC.allowmetonotD.notallowmeto（）8.---WhenIcamein,Isawhim_______withhispetdog.---Heloveshisdogverymuch.Ioftenseehim_____hisdoginthepark.A.play,walkB.playing,walkC.play,walkingD.playing,walking（）9.Ihavenothing_____youaboutthiscity,forIamnewhere.A.tellingB.totellC.tellsD.
7、told3（）10.Wefinditdifficult_______outtheproblem.Canyougiveusahand?A.toworkB.workingC.worksD.worked（）11.Whynot________withus?A.playB.toplayC.playedD.playing（）12.Cindysaidshewouldtryherbest_____upwithus.A.tocatchB.catchingC.catchD.caught（）13.Tellhim______thelight. A.tot
8、urnB.nottoturnonC.tonotturnD.nottoturn (）14.Nobodyknows__________next. A.whattodoB.todowhatC.whichtodoD.howtodo （）1
