英语人教版八年级下册现在完成时.pptx

现在完成时态的复习,unit8-unit10,现在完成时谓语动词的构成:,主语+have/has+Vp.p(过去分词)1.I_(finish)homeworkalready.2.He_(learn)Englishforthreeyears.,havefinished,haslearned,句式变换,1Hehasfinishedhishomework.(变为否定句)2TheyhavevisitedChinabefore(变为一般疑问句，并做肯定回答),Hehasntfinishedhishomework.,HavetheyvisitedChinabefore?Yes,theyhave.,想一想,1.现在完成时定义2.常用的时间状语有哪些？（Unit8and9）3.你能说出already和yet有哪些不同吗？,表示过去发生的动作对现在造成的影响和结果,时间状语：already，yet,ever,never,just,before，sofar等,注意：already用于肯定句中，yet用于否定句和疑问句中。,用动词适当形式填空：,1I_(do)myhomeworkalready.2He_(notfinish)hishomeworkyet.3We_never_(see)thisbookbefore.4Mother_just_(clean)thehouse.5Sally_(visit)Chinabefore.,用动词适当形式填空：,1Ihavedone(do)myhomeworkalready.2Hehasntfinished(notfinish)hishomeworkyet.3Wehaveneverseen(see)thisbookbefore.4Motherhasjustcleaned(clean)thehouse.5Sallyhasvisited(visit)Chinabefore.,现在完成时（Unit10）,1、句中有和时，短暂性动词变延续性动词2、常用的时间状语有哪些3、for和since的区别？,现在完成时（Unit10）,1、句中有for和since时，短暂性动词变延续性动词2、时间状语for和since的区别for+一段时间，foraweek,for3years,foralongtimesince+时间点，since2oclock，sinceyesterday,since+时间段agosince5yearsago,since+一般过去式的从句,sinceIcamehere等,注意：对for或since引导的时间状语提问必须用howlong,1Ihavelivedherefor10years.Howlonghaveyoulivedhere?2Shehasstoodheresince2hoursago.Howlonghasshestoodhere?,选用since和for填空,1Wehaventseeneachother_alongtime.2Hisfatherhasbeenintheparty_10yearsago.3Thefilmhasbeenon_20minutes.4MrGreenhasworkedhere_hecametoChina5Hisgrandfatherhasbeendead_twoyears.,选用since和for填空,1Wehaventseeneachotherforalongtime.2Hisfatherhasbeenintheparty_since10yearsago.3Thefilmhasbeenonfor20minutes.4MrGreenhasworkedheresincehecametoChina5Hisgrandfatherhasbeendeadfortwoyears.,havebeento与havegoneto区别,havebeento曾经去过某地（已经回来）havegoneto去了某地（还没回来）,Trueorfalse?,1IhavegonetoJapanbefore()2Guilinisverybeautiful,Ihavebeentotheretwice.()3HisfatherhasgonetoBeijing.Hewillbebacknextweek()4wherehaveyougone（）,Trueorfalse?,1IhavegonetoJapanbefore(F)been2Guilinisverybeautiful,Ihavebeentotheretwice.(F)3HisfatherhasgonetoBeijing.Hewillbebacknextweek(T)4wherehaveyougone（F）been,你能说出一般过去时与现在完成时的区别吗？,一般过去时与现在完成时有一些明显的时间状语。1yesterday,lastyear,in+过去某一年，twoyearsago，justnow等常用于一般过去时。2already，yet,never,ever,just,before,sofar,inthepast/lastyears,for+时间段，since+时间点等常用与现在完成时。,注意：在现在完成时的肯定句中，短暂性动词不能和for，since引导的时间状语连用，必须改成延续性动词。,最常见的有：buy-haveborrow-keepleave-beawaydie-bedeadcome/go/arrive-behere/beinbegin/start-beonjoin-bein/beamemberof,当堂检测,一句式变换：1.JackhasvisitedChinabefore.(改为否定句)Jack_visitedChinabefore.2.Theyhavecomeintotheclassroom.(改为一般疑问句)_comeintotheclassroom?3.Hehasbeenherefor12years(划线提问)_hashebeenhere?,hasnot,Havethey,Howlong,二、用所给词的正确形式填空,1I_(live)herefortenyears.2I_(live)herein1998.3He_(notreturn)thebookyet.三