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现在完成时现在完成时功能短暂性动词延续性动词结构标志词动词havegoneto/havebeento/havebeenin现在完成时vs一般过去时过去分词Heisfull.Hehashadabigbreakfast.1.过去某一时间点发生的动作对现在产生影响。功能：IIhavelearnedhavelearnedEnglishfortenyearsEnglishfortenyears2.过去某一时间点发生的动作持续到现在或还将持续下去。基本结构基本结构have/has+done助动词（可以帮助构成肯定、疑问和否定句）过去分词1.Hehascleanedhisroom.(写一个一般疑问句）Hashecleanedhisroom?2.ShehaslivedinLondonforfouryears.(划线部分提问）HowlonghasshelivedinLondon?3.HehasbeentoChina,________?（写出反义疑问句部分）hasn’the4.Theyhavecomebackfromwork.(写否定句）Theyhaven’tcomebackfromwork.过去分词(Pastparticiple)的构成1.规则动词：规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。1.直接加-ed。如：2.以字母e结尾的直接加d。如：3.以辅音字母加y结尾的，变y为i加ed。如：4.重读闭音节且末尾只有一个辅音字母，双写这个辅音字母再加-ed。如：2.不规则动词：详见课本附录P136-137play-playedstudy-dance-dancedstudiedstop-stoppedWhatarethekeywordsforthePresentPerfectTense?A:______yourbrother______hishomeworkyet?(finish)B:Yes,he‘salreadydoneit.KeyKeywordswordsHasfinishedyetalready注意：already用于肯定句，yet用于疑问句和否定句中A:_______youever_______tothepark?(be)B:No,never.KeyKeywordswordsHavebeenyetalreadyevernever注意：ever曾经用于疑问句中never从不带有否定意义I______just________thedesk,youcantakeittoyourclassroom.(mend)KeyKeywordswordshavemendedyeteverneverjustalreadyjust刚刚与现在完成时连用一般置句中justnow刚才与一般过去时连用Tom___________inthefactorysinceheleftschooltenyearsago.(work)KeyKeywordswordshasworkedyeteverneversincealready1.过去时间点（1990，thismorning)since+2.段时间+ago3.从句（过去时）justA:Howlong______you________inthisschool?(teach)B:For6years.KeyKeywordswordshavetaughtyeteverneversinceforalready+一段时间justWe_______only____________100treessofar.(plant)KeyKeywordswordshaveplantedyeteverneversinceforjustalreadysofar到目前为止KeyKeywordswordsyeteverneversinceforjustbeforealreadysofarinthepast10yearstwice也可以是其他表示次数的词howlonginrecentyears中考链接1.IhavepostedalettertomypenfriendinAmerica.A.alreadyB.yetC.fortwodays2.Youhaveneverheardsuchastory,you?A.haven’tB.don’tC.haveAC•Hehasboughtthebook.•Hehasboughtthebookforaweek.•Hehashadthebookforaweek.buyhavecome/go/gettobeinjoinbeinbea…memberleavebeawayborrowkeepbeginbeonfinishbeoverdiebedeadreturnbebackShehasboughtthecomputerfortwoyears.hadbuyhave/hashadHowlonghaveyoucometotheUnitedStates？beenincometohave/hasbeeninbuyhave/hashadAnnhasgonetoChinasincethreemonthsago.beenincometohave/hasbeeninbuyhave/hashadgotohave/hasbeeninMybrotherhasjoinedthearmyforfiveyears.beeninbeenasoldiercometohave/hasbeeninbuyhave/hashadgotohave/hasbeeningottohave/hasbeeninjoinhave/hasbeeninhave/hasbeenasoldierIhaveleftShanghaifor3days.beenawayfor3days.cometohave/hasbeeninbuyhave/hashadgotohave/hasbeeningottohave/hasbeeninjoinhave/hasbeeninhave/hasbeenasoldierleavehave/hasbeenawayIhaveborrowedthedictionarysince3daysago.keptcometohave/hasbeeninbuyhave/hashadgotohave/hasbeeningottohave/hasbeeninjoinhave/hasbeeninhave/hasbeenasoldierleavehave/hasbeenawayborrowhave/haskeptThefilmhasbegunfor10minutes.beenoncometohave/hasbeeninbuyhave/hashadgotohave/hasbeeningottohave/hasbeeninjoinhave/hasbeeninhave/hasbeenasoldierleavehave/hasbeenawayborrowhave/haskeptbeginhave/hasbeenonTheconcerthas...