英文版现在进行时用法详解ppt课件.ppt

SimplePresentTense现在进行时,1,Howdowemakesimplepresenttense（构成）,subject+auxiliaryverb+mainverb主语+情态动词+主动词dobaseForpositivesentences,wedonotnormallyusetheauxiliary.Forthe3rdpersonsingular(he,she,it),weaddstothemainverborestotheauxiliary.(does)Iftheverbendsin-ss,-sh,-ch,-xor-o,add-estothebaseform:kiss-kisses,finish-finishes,watch-watches,mix-mixes,gogoesIftheverbendsinconsonant+ychangeytoiandadd-es:study-studies,copy-copies,try-tries,carry-carriesFortheverbtobe,wedonotuseanauxiliary,evenforquestionsandnegatives.(seetable2)Auxiliaryverbsdo,have,whichcanalsobeusedasmainverbs,todotohaveI/you/we/theydoI/you/we/theyhavehe/she/itdoeshe/she/ithas,2,Lookattheseexampleswiththemainverblike:,3,Lookattheseexampleswiththemainverbbe.Noticethatthereisnoauxiliary:,4,Whendoweusesimplepresenttense（何时使用）,Facts,generalizationsanduniversaltruths（事实，结论，普遍真理）Habitsandroutines（习惯和日常活动）Permanentsituations（不变的情况）Eventsthatarecertaintohappen（一定要发生的事件）Arrangementsthatwecantchange(e.g.timetables,officialmeetings)（不能改变的安排）Stateverbs(e.g.be,have,suppose,know)（静态动词）Narrations,instructionsorcommentaries（叙述，说明或评论解说）,5,Use1:Facts,GeneralizationsandUniveralTruthsWeusethePresentSimpletotalkaboutuniversaltruths(forexample,lawsofnature)orthingswebelieveare,orarenot,true.Itsalsousedtogeneralizeaboutsomethingorsomebody.Waterboilsat100degreesCelcius.UniversalTruthItisabighouse.FactTheEarthgoesaroundtheSun.UniversalTruth,FactDogsarebetterthancats.GeneralizationTheElephantdoesntfly.FactLondonisthecapitalcityofFrance.Fact(Remember:thesentencedoesnothavetobetrue),6,Use2:HabitsandRoutinesWealsousethistensetodescribeactionsthathappenfrequently.Forexample:habits,routines.Weleaveforworkat7:30AMeverymorning.RoutineMyhusbandwatchestheTVintheevening.Habit,RoutineSusanoftenmeetswithherfriendsafterschool.Habit,RoutineTheyusuallyplayfootballonSunday.Habit,Routine,7,AdverbsofFrequencyThePresentSimpleisoftenusedwiththefrequencyadverbs:alwaysfrequently/oftenusuallyseldom/rarelynowadaysnevereveryweek/yearsometimes/occasionallyfromtimetotimeeverynowandthenAfewexampleshowtousetheminsentences:IalwaysgotochurchonSundays.Inevereatanythingafter10PM.,8,Use3:PernamentSituationsUsethePresentSimpletotalkaboutsituationsinlifethatlastarelativelylongtime.IliveinBostonHeworksasafireman.MargaretdrivesaVolkswagen.Jerrydoesntteachmathsathighschool.,9,Use4:EventsCertaintoHappenUsethePresentSimplewhenaneventiscertaintohappeninthefuture.Mygrandmotherturns100thisJuly.WinterstartsonDecember21.,10,Use5:FutureArrangementsUsethePresentSimpletotalkabouteventsthatwecantchange(forexample,anofficialmeetingoratraindeparture).Themeetingstartsat4PM.Thetrainleavesatthenoon.Whendoestheplanetakeoff?Jerrydoesntteachmathsathighschool.,11,Use6:Narrations,InstructionsorcommentariesThePresentSimpleisalsousedinnarrations(e.g.totellastoryorajoke),instructions(e.g.cooking)orcom