一般过去时、现在完成时与一般现在时的区别(课堂PPT).ppt

（一）一般过去时态、现在完成时态、一般现在时的概念现在完成时表示过去的动作（或状态）对现在产生的影响和结果．常与ever，never，before,twice,already,just，yet，sofar，since,for，uptonow，inpastyears等，皆不确定或模糊的时间状语连用。例如Hehasjustbrokenhisbottle.一般现在时表示经常性，习惯性的动作或存在的状态.通常与副词sometimes,often,usually,always,everyday(year,month),once(twice,threetimes)aday,等时间状语连用。Theyusuallygotoschoolbybike.Itakethemedicinethreetimesaday.Shehelpshermotheronceaweek.HeoftenwatchesTv.MarylikesreadinginterestingstoriesMary’sfatherisapoliceman.Thereare50studentsinmyclass.(二）一般过去时态、现在完成时和一般现在时的区别２）现在完成时表示从过去发生一直持续到现在（包括现在）的某个动作或状态，与现在有关的时间状语连用，一般过去时表示过去某一特定（与现在无关）的时间，与具体的表示过去的时间状语连用。例如：例如：Wearegoodfriends(现在情况)我们是好朋友。Igottoknowhimin2005.(过去的动作)我在2005年认识（结识）他Wehaveknowneachothersince2005.(现在完成时把过去的动作和现在联系起来并着眼于现在)自从2005年来我们就相互认识。（三）值得注意几个问题5）just(刚刚）与现在完成时连用，justnow(刚才）与一般过去时连用。例如：(四）现在完成时应注意的四个区别A、leave—beenawayfrombuy—haveborrow—keepdie—bedeadgetup—beupturnon—beoncome/getback—bebackgototown—beintownfinish—beovercatchacold—haveacoldclose—beclosed/notopenopen—beopenfallill/asleep—beill/asleepbegin/start—beonget/receivealetterfrom—havealetterfromB、cometo—behere/therearrivein（at）/getto/reach——behere/therejointheArmy-------beintheArmy/beasoldierjointheLeague-----beintheLeague/bealeaguememberHedied10yearsago.---He____________for10years/since10yearsago.2.Heborrowedthebook2weeksago.---He________thebookfor2weeks.3.Heboughtthemotorbikeamonthago.---He________themotorbikeforamonth.4.Hearrivedherethreedaysago.---He________heresincethreedaysago.5.Theyturnedonthelight2hoursago.---Thelight____________for2hours.6.Helefthere2yearsago.---He____________fromherefor2years.7.Thefilmbegan30minutesago.---Thefilm____________for30minutes.8.Theyopenedthedooranhourago.---Thedoor____________foranhour.9.Theyclosedthedooranhourago.---Thedoor____________foranhour.10.Hejoinedthearmylastyear.---He________a____forayear.---He____________thearmyforayear.---It____ayear____hejoinedthearmy.Hedied10yearsago.---Hehasbeendeadfor10years/since10yearsago.2.Heborrowedthebook2weeksago.---Hehaskeptthebookfor2