资源描述：
《现在完成时过去完成时学习资料.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、现在完成时过去完成时注意：1)现在完成时不能单独与过去的时间状语连用,如yesterday,lastweek,threeyearsago等;2)不能与when连用3).现在完成时往往同表示不确定的过去时间状语连用用法一：表示(不确定的)过去发生的动作对现在产生影响或造成结果。Ihavealreadylostthekey.(我现在没有钥匙)Ihaven’treadthatbookyet.(不了解书的内容)Ihavejustcleanedmyhands.(手是干净的)常与already(已经),yet(已经),just(刚刚),ever(曾经)never(从不)，recently(最近),late
2、ly(近来)等词连用.already:常用于肯定句中.yet:常用于否定句,疑问句尾.注意：just:刚刚，与现在完成时连用justnow:刚才，与一般过去时连用e.g.IhavejustboughtapenIboughtapenjustnow.用法二:表示从过去开始并持续到现在的动作或状态，也可能继续持续下去，只能用于某些延续性动词，常与for…,since…,或和表示从过去某时到现在这段时间的时间状语（如:sofar,uptonow,inthelastfewyears/days等）连用。ShehaslearnedEnglishfor5years.HehaslivedinBeijingsin
3、cehewasborn.HashelivedinShenzhenfor4years?since:(自…以来)1)since+时间点He has stayed heresince 5 o’clock.2)since+时间段+agoHe has stayed heresince 5 hours ago.3)since+从句She has taught Englishsince he came here.for:(长达）for+时间段Hehaskeptthebookfor2weeks.since,for的用法:Takenotes用for或since填空Mr.BrownhashadhisTV_____
4、_15years.I’vetakendrivinglessons_______lastmonth.Mysisterhashadhercellphone______amonth.Myfriendshaven’tvisitedme______mybirthday.Wehaven’tusedourcar_____alongtime.Shehasn’thadagoodcupofcoffee_____years.Tomhaswornglasses_______hewas7yearsold.forsinceforsinceforforsince注意：瞬间动词在肯定句中不能与for，since等表示一段时间
5、的时间状语连用延续性动词表示能够延续的动作，这种动作可以延续下去或产生持久影响。如：learn, work, stand, lie, know, walk, keep, have, wait, watch, sing, read, sleep, live, stay等。瞬间动词也称非延续性动词、终止性动词或短暂性动词，表示不能延续的动作，这种动作发生后立即结束。如：open, close, finish, begin, come, go, arrive, reach,get to, leave, die, borrow,buy等。当现在完成时+一段时间注意：1)TomhasstudiedRus
6、sianforthreeyears.=TombegantostudyRussianthreeyearsago,andisstillstudyingitnow. 2)(错)Harryhasgotmarriedforsixyears.=Harrybegantogetmarriedsixyearsago,andisstillgettingmarriednow.改为:Harrygotmarriedsixyearsago.或Harryhasbeenmarriedforsixyears.误Ihavereceivedhisletterfortwodays.正Ireceivedhislettertwodays
7、ago.Ihavehadhisletterfortwodays.ItistwodayssinceIreceivedhisletter.*瞬间动词在否定句中则可以与表示一段时间的时间状语连用。Ihaven’treceivedhisletterforalongtime.Hehasn’tmarriedsincehebrokeupwithhisgirlfriend.动作状态diebeoverleavear
