2017人教版八年级下英语现在完成时语法讲解

eg:Hehaslivedherefor6years.（他在这儿住了六年了，一直住在这儿，live是延续性动词，并且很有可能继续居住下去）Ihaveknownhersincethen.(自从那时起我就认识她了，一直都认识， know是延续性动词)非延续性动词：也成终止性动词或瞬间动词，表示不能延续的动作，这种动作发生后立即结束.eg:open,close,begin,finish,come,go,move,borrow,lend,buy,die ⋯非延续性动词不能与for和since引导的时间状语连用，常用的时间状语有twoyearsago,at56clock,yesterday,thedaybeforeyesterday,thismornin 等表示过去的时间?eg:Hisgrandmotherdied10yearsago.Shefinishedtheworkat6oclock.2.非延续性动词与延续性动词之间的转换(常用)(1).转化为相应的延续性动词，用于现在完成时态eg:borrow宀keepbuy宀haveeg:borrow宀keepbuy宀haveputonfweargettoknowfknowgettosleepfsleepcatchacoldfhaveacold.(2)⋯.转化为.⋯“⋯be+形容词/副词./介词/名词”eg:begin/startfbeoneg:begin/startfbeongooutfbeoutdiefbedeadopenfopenfbeopenleavefgetto/arrivein（at） fbein+地点beaway（from）getup/reachfinishbeaway（from）getup/reachfinishfbeoverfallillfbeillfbeupfallasleepfbeasleepjoinfbein+活动/组织gotoschoolfbeinschoolbecomefbegotoschoolfbeinschoolbecomefbemakefriendsfbefriendsclosefbeclosedgotobedfbeinbedcome/gobe+相应的介词短语例：下面是句子的同义句转换将原句一般过去时改成现在完成时例：下面是句子的同义句转换将原句一般过去时改成现在完成时3.Heboughtthebikethreeyearsago.Hehashad bikeforthreeyears.3.Heboughtthebikethreeyearsago.Hehashad bikeforthreeyears.5.Mysisterbecabmikeeasinucresethoreneyearsaaggoo..

Mysisterhasbeenanurseforoneyear.beenanursesinceoneeg:1.Theoldmandiedfouryearsago. （一般过去时）Theoldmanhasbeendeadforfouryears. （现在完成时，将die变为bedead）Theoldmanhasbeendeadsincefouryearsago （现在完成时，since跟过去的时间点）2.Iborrowedthebookfivedaysago.Ihavekeptthebookforfivedays.theIhavekeptthebook[sincefivedaysago.Hehashadthe4.Shewenttoschooltwodaysago.

Shehasbeeninschoolfortwodays.Shehasbeeninschoolsincetwodaysago.Mysisterhasyear.year.例Ih题a：ve1k?noLwinLehiejorisniendceththeePna.rtythreeyearsago ?（同义句）（自L从iL那e时i_起_我__就__认_识__她_了，一__直_都__认识th，ePartkyno_w__是_延_续th性re动e词ye）非Li延Le续iePartyars.，表示t不hre能e延ye续ar的s动ag作o.，这种动作发生后2.MyfatherleftGuizhoulastweek. （同义句）Myfather Myfather Guizhou aweek.Guizhou lastweek.Thefactoryopenedin佃96.（同义句）Thefactory tenyears.Thefactory since佃96.Mr.WangreachedBeijingfivedaysago.Mr.Wang Beijing fivedaysago.Mr.Wang Beijing fivedays.Thefilmbegantenminutesago.Thefilm for .Thefilm since Sheboughtthenewcarthreeyearsago.She thenewcar t