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 go goesIftheverbendsinconsonant ychangeytoiandadd es study studies copy copies try tries carry carriesFortheverbtobe wedonotuseanauxiliary evenforquestionsandnegatives seetable2 Auxiliaryverbs do 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 Arrangementsthatwecan tchange 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 It salsousedtogeneralizeaboutsomethingorsomebody Waterboilsat100degreesCelcius UniversalTruthItisabighouse FactTheEarthgoesaroundtheSun UniversalTruth FactDogsarebetterthancats GeneralizationTheElephantdoesn tfly 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 Jerrydoesn tteachmathsathighschool 9 Use4 EventsCertaintoHappenUsethePresentSimplewhenaneventiscertaintohappeninthefuture Mygrandmotherturns100thisJuly WinterstartsonDecember21 10 Use5 FutureArrangementsUsethePresentSimpletotalkabouteventsthatwecan tchange forexample anofficialmeetingoratraindeparture Themeetingstartsat4PM Thetrainleavesatthenoon Whendoestheplanetakeoff Jerrydoesn tteachmathsathighschool 11 Use6 Narrations InstructionsorcommentariesThePresentSimpleisalsousedinnarrations e g totellastoryorajoke instructions e g cooking orc