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现在完成时ThePresentPerfectTenseContents现在完成时的构成过去分词的变化规则现在完成时的用法现在完成时的标志词一般过去时vs现在完成时havebeento和havegoneto
Ihavealreadybrushedmyteeth.过去分词肯定句:主语+have/has+done否定句:主语+have/has+not+done疑问句:Have/Has+主语+done→Yes,主+have/has.→No,主+haven’
t/hasn’t.现在完成时的构成Hehasfinishedhishomework.→Hehasnotfinishedhishomework.→Hashefinishedhishomework?→Yes,hehas./No,hehasn’t.Myparentshav
ebeentotheUSA.→Myparentshaven’tbeentotheUSA.→HaveyourparentsbeentotheUSA?→Yes,theyhave./No,theyhaven’t.1.直接加-ed,如:worked2.
不发音-e结尾,加d,如:hoped3.辅音+y结尾的,把y变i加ed,如:carried4.重读闭音节结尾,双写辅音字母+ed,如:stopped过去分词的变化规则规则变化:不规则变化:AAA型(原形,过去式,过去分词三种形
式都一样)cost-cost-costhit-hit-hitput-put-putread-read-readABB型(过去式与过去分词相同)buy-bought-boughtcatch-caught-ca
ughtfind-found-foundhave-had-hadABA型(原形与过去分词相同)come-came-comebecome-became-becomeABC型(三种都不一样)do-did-donego-went-gonetake-took-takenwrite-wrote-wr
ittenpastnowfuture对现在有影响Yesterday,theycleanedtheclassroom.Now,theclassroomiscleanbecausetheyhavecleanedit.用法1强调过去发生的动作对现在产生
的结果或影响。现在完成时的用法1.Isawthisfilmlastweek.Now,IknowthisfilmbecauseIhaveseenitbefore.2.Ididmyhomeworkyesterday.Now,Icang
iveittotheteacherbecauseIhavedoneit.3.Shehadbreakfastinthemorning.Now,sheisnothungrybecauseshehashadbreakfast.用法一:强调过去发生的动作对现在产生的结果或影响。现在完成时的用法用
法2过去发生的动作一直延续到现在。pastnowfutureIbegantoteachEnglishatthisschoolthreeyearsago.IhavetaughtEnglishatthisschoolforthreeyears.现在完成
时的用法1.Sheisadoctor.Shebegantoworkwhenshewas20.Now,sheis28.Shehasworkedforeightyears.2.TheywenttoLondonlastSaturday.TodayisSaturday
.TheyhavestayedinLondonsincelastSaturday.现在完成时的用法用法二:强调过去发生的动作一直延续到现在。现在完成时的标志词already“已经”通常用于肯定句中,放在句中。Ihavealreadyreadthisbook.Sheha
salreadyfinishedherhomework.yet“仍然,还”用在疑问句和否定句中,放在句末。Ihaven’treadthisbookyet.Haveyouhadbreakfastyet?ever“曾经”通常用于疑问句和
肯定句中,放在句中。Ihaveeverseenthisfilm.HaveyoueverbeentotheUSA?never“从来不”,放在句中,表示否定。Ishefamous?Ihaveneverheardofhim.Shehasneverbee
ntoCanada.just“刚刚”用在陈述句中,放在句中。Ihavejustboughtanovel.Shehasjusthaddinner.before“以前”用在完成时中,放在句末。Ihavene
verreadthiskindofbooksbefore.HaveyoubeentoShanghaibefore?标志词:since&forfor+时间段for2yearsforalongtimesince+时间点since2yearsagosince1998sincela
stweeksinceshecametotheschoolTheyoungteacherhasworkedatthisschoolfor2years.(sincetwoyearsago)用for和since填空。______threehours______threeo’clock______two
days______yesterdayafternoon______Icamehere______lastSunday_______aweek_______alongtime_______1997______twoweeks_______threeyearsago_______las
tmonthforforforforforsincesincesincesincesincesincesince1.Ihavebeenhere5weeks.2.He’sstudiedEnglish3years.3.Ihaveb
eenhere2000.4.They’velivedinShanghaitheymarriedin2000.5.Shehasworked10hours.6.Hehasworkedasalawyer5yearsago.forforforsincesinces
ince对for或since引导的时间状语提问用howlongHe’sstudiedEnglishfor3years.HowlonghashestudiedEnglish?They’velivedinShanghaisincetheymarriedin2000.Howlonghaveth
eylivedinShanghai?1.现在完成时可与recently(最近),sofar(到目前为止),inthepast(在过去)inthelastfewyears(在过去的几年)uptonow(直到现在)
等时间状语连用。2.现在完成时可与once,twice,threetimes,severaltimes等表重复次数的词语连用。一般过去时vs现在完成时一般过去时现在完成时过去某时间发生的动作或存在的状态1.过去
的动作对现在产生的影响;2.过去开始延续到现在的动作或状态。与现在无联系与现在有联系标志词:yesterday,lastweek,twoyearsago,inthepast,justnow......标志词:already,yet,just,recently,ev
er,for+时间段,since+时间点Ihaveborrowedthebookforsixmonths.XIhavekeptthebookforsixmonths.√非延续性动词延续性动词下面两句话有一句是错误的,快来找出来它非延续性动
词延续性动词buyhaveborrowkeepend/finishbeoverbegin/startbeoncome/gobe(in)leavebeawaydiebedeadputonweararrive/get/reachbe(in)joinbe
in开始结束死买卖来去借入不离开到达穿上就参加for,since,howlong要跟延续性动词连用1.—Howlonghaveyourparents_______?—Forabout15years.A.lefttheirh
ometownB.gottoJinanC.joinedtheping-pongclubD.workedinthiscity2.—Howlonghaveyou___________?—Foralmostten
years.A.ownedthisgardenB.boughtthiscarC.arrivedinShanghaiD.cometothistown3.—Howlonghasyoursister_______?—Fornearlythreemonth
s.A.borrowedthebookB.becomeateacherC.gottoJinanD.keptthebikeDDA4.Ihavewaitedforthebusfortwentyminutes.(
划线部分提问)__________haveyouwaitedforthebus?5.Susanhasbeenavolunteerinthehospitalforthreeyears.(划线部分提问)__________hasSusanbeenavolunteeri
nthehospital?6.Billhasmadesomenewfriendshere.(改为一般疑问句)_____Bill__________newfriendshere?HowlongHowlongHasmadeany找规律Sheha
sneverbeentoLondon.---HaveyoueverbeentoLondon?---Yes,Ihavebeentheretwice.WehavebeentoLondon,anditiswonderfulthe
re.去过且已经回来有表示频率的词:never,ever,twice有评价性的话语:Thatplaceiswonderful,beautiful,awful.....havebeento和havegoneto找规律Shehas
gonetothepark,andshewillbebackintwohours.TomhasgonetoMike'shome,buthehasn'tcomeback.去而未归,主语一般是第三人称。havebeento和havegoneto1.—WhereisTom?Doyoukn
ow?—Ithinkhe______tothelibrary.A.hasgoneB.goesC.hasbeenD.wentA2.—IsTomathome?—No,he_______totown.A.hasbeenB.hasgoneC.
goesD.willgoB