会计学现在(xiànzài)完成时现在(xiànzài)完成时的构成Mother:John,cleanyourteethplease.现在(xiànzài)完成时的基本句型：现在完成(wánchéng)时的时间状语现在(xiànzài)完成时的主要用法2.表示(biǎoshì)人曾有过或到目前为止从未有过的经历.上一页since:(自…以来(yǐlái))1)since+时间点Hehasstayedheresince5o’clock.2)since+时间段+agoHehasstayedheresince5hoursago.3)since+从句ShehastaughtEnglishsincehecamehere.for:(长达）for+时间段Hehaskeptthebookfor2weeks.Practice:1.I’mafraidyouarelate.Themeetinghasbeenon----tenminutesalready2.Howlonghaveyoustudiedinthisschool?-------fiveyearsagohavebeen与havegone的用法(yònꞬfǎ)比较用Havebeento,havegoneto,havebeenin填空(tiánkòng)一般过去时与现在(xiànzài)完成时的区别①一般过去时只强调过去的动作；现在完成时强调过去的事情对现在的影响。②一般过去时通常与表示过去的时间状语连用(liányòng)；现在完成时则不能与表示过去的时间状语连用(liányòng)。③一般过去时单纯表示过去的经历；现在完成时表示过去的动作或状态延续到现在并可能持续下去。一般过去(guòqù)时的时间状语有：yesterday,lastweek,…ago,in1980,inOctober,justnow…共同的时间状语有：thismorning,tonight,thissummer,before,already,…现在完成时的时间状语有：for,since,ever,never,just,already,yet,inpastyears…动词填空：1._____you________(clean)theroom?Yes,we__________(do)thatalready.When_______you______(do)it?We_______(do)itanhourago.2.______he______(see)thisfilmyet?Yes.When_____he_____(see)it?He______itlastweek.3.Howmanytimes_____you______(be)there?Thehouseisdirty.We_______itforweeks.Adidn’tcleanBhadn’tcleanedCdon’tcleanDhaven’tcleaned2.---____thesportsmeetingmightbeputoff.---Yes,italldependsontheweather.AI’vebeentoldBI’vetoldCI’mtoldDItold3.----I’msorrytokeepyouwaiting.----Oh,notatall.I_____hereonlyafewminutes.AhavebeenBhadbeenCwasDwillbe4.Youdon’tneedtodescribeher.I_______herseveraltimes.A.hadmetBhavemetCmetDmeet5.-----WillyougotoBeijingforvacation?-----I_______togo,butIdon’tknowifIcango.AwasplanningBhaveplannedChadbeenplanningDhavebeenplanning6.--Whenwilltheyleave?---They______verysoon.AdoleaveBareleavingChaveleftDleave7.Theteachertoldthepupilsthattheearth____round.AisBwouldCwasDwere8.I----thisbookfortwoweeks.Ihavetoreturnitnow.AborrowedBhaveborrowedCkeptDhavekept9.We----1,000Englishwordssincewe-----tothisschool.Alearn;comeBhavelearning;cameChave