八年级英语下册 Unit 2 Travelling grammar 2课件 （新版）牛津版.ppt

presentperfecttense 现在完成时态 8bunit2grammar2 用法1 现在完成时态的含义是表示过去发生的或已完成的动作对现在造成的影响或结果 特点是既涉及过去 又联系现在 动作是过去发生的 结果是现在存在的 look theblackboardissocleannow hehascleanedtheblackboard 他已经擦过黑板了 这句话所表示的结果是黑板现在是干净的 用法2 表示动作或状态从过去开始一直延续到现在甚至将来 mikeborrowedthebookstwodaysago mikehaskeptthebooksfortwodays 1 wehavelearntenglish 3years 3yearsago we come here for since came howlonghaveyoulearntenglish 5 for 一段时间since 过去的时间点就画线提问用howlong 想一想 since 标志词 for 一段时间 since 过去的时间点 theseyears sofar inthepast last years we learn englishforthreeyears sincetwoyearsago since2000 mr green be inchinatheseyears they write 15songssofar thepopulation grow moreslowlyinthepasttenyears havelearned hasbeen havewritten hasgrown 瞬间动作不能于表示一段时间的短语连用 应改用持续性动词 常见的非延续性动词与延续性动词的转换 buy havegoout beoutleave beawaybegin start beoncome go bein atborrow keepjoin beamemberdie bedeadcatchacold haveacoldbecome befallasleep beasleepopen beopengettoknow knowclose beclosedarrive bein atgetmarried bemarriedstop beover 1 ihaveborrowedthebookfor2weeks 2 thefilmhasbegunfor5minutes kept beenon 1 这辆自行车我买了两年了 i ve thebike twoyears 2 heleftnanjingtwoyearsago he nanjingfortwoyears 3 themonkeydiedlastmonth themonkey foramonth 4 a honglong you b twoweeks a did getillb have fallenillc were illd have beenill 练一练 hadfor hasbeenawayfrom hasbeendead d 1 sheisn therenowbecauseshe thezoo a hasbeentob havegonetoc hasgoneto2 thegreens guilintwice d havegonetoa havebeentob havebeeninc hasbeenin3 lilyhasmadelotsoffriendssinceshe here a comeb hasbeenc camed coming4 myparents inbeijingsince1995 a arelivingb havelivedc livedd willlive5 hisgrandma for2years wasdiedb hasdiedc wasdeadd hasbeendead c a c b d exercise 1 haveyou thebike yes i it10minutesago mend 2 ihave thefilm titanic when you it see 3 i msorry ihaven tgotanymoney i ve leave myhandbagathome 4 ihave read thebook 5 it salongtimesincewe meet lastyear 6 look thetrain just come mended mended seen did see left read met has come exercise 现在完成时和一般过去时的区别 现在完成时 强调这一动作产生的结果对现在的影响 与现在有关 一般过去时 仅仅表示在过去某一时刻曾发生过这一动作 与现在无关 他已学英语五年了 hehasstudiedenglishforfiveyears 他曾学过五年英语 hestudiedenglishforfiveyears 说明他还继续学下去 只说明他过去学过五年英语 但现在不学了 一般过去时与现在完成时有一些明显的时间状语 遇到yesterday lastyear inmay in 过去某一年 twodaysago theotherday justnow等就用一般过去时 当有sofar inthepast lastfewdays 在过去 最近的几年里 since接过去时间状语或过去时的句子等常用现在完成时 现在完成时和一般过去时 he work inourschoolforoneyear he come toou