英文版現(xiàn)在進(jìn)行時(shí)用法詳解ppt課件.ppt

SimplePresentTense現(xiàn)在進(jìn)行時(shí),1,Howdowemakesimplepresenttense（構(gòu)成）,subject+auxiliaryverb+mainverb主語+情態(tài)動(dòng)詞+主動(dòng)詞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（何時(shí)使用）,Facts,generalizationsanduniversaltruths（事實(shí)，結(jié)論，普遍真理）Habitsandroutines（習(xí)慣和日?；顒?dòng)）Permanentsituations（不變的情況）Eventsthatarecertaintohappen（一定要發(fā)生的事件）Arrangementsthatwecantchange(e.g.timetables,officialmeetings)（不能改變的安排）Stateverbs(e.g.be,have,suppose,know)（靜態(tài)動(dòng)詞）Narrations,instructionsorcommentaries（敘述，說明或評論解說）,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