八年级英语上册unit 6 How long have you been collecting shells (ppt)新人教版.ppt

unit6 howlonghaveyoubeencollectingshells period1sectiona 1a grammarfocus istartedteachingenglishin2001 iamstillteachingenglishnow howlonghaveyoubeenteachingenglish ihavebeenteachingenglish forabout5years since2001 自从 自 以来 已 hestartedteachingmathwhenhewas20yearsold heis50yearsoldnowandheisstillteachingmath howlonghashebeenteachingmath hehasbeenteachingmath 30yearsago for30years since hewas20yearsold 前 2hours howlonghasshebeenreading shehasbeenreadingfor2hours shehasbeenreadingsince2hoursago halfanhour howlonghashebeenplayingcomputergames hehasbeenplayingcomputergames forhalfanhour sincehalfanhourago 45minutes howlonghavetheybeenplayingsoccer theyhavebeenplayingsoccer for45minutes since45minutesago anhour howlonghavetheybeenswimming theyhavebeenswimming foranhour sinceanhourago 15minutes howlonghashebeendrawingapicture hehasbeendrawingapicturefor15minutes since15minutesago shell 收集贝壳 collectshells marathon 马拉松赛跑 newwords skaten apairofskatesn heisskating v heisaskater alison victor sam celia 1blisten areportistalkingtotheparticipantsinaskatingmarathon fillinthebelow i vebeenskatingforfivehours iskatedfortwohours 1cpairworkaskandanswerquestionsaboutthepeopleinthepicture a howlonghasalisonbeenskating b he sbeenskatingforfivehours a howlongdidsamskate b heskatedforfourhours he s hehas listening 2a 2b howlongdidyouskatetoday howlonghaveyoubeenskatingtoday 3 wasthisyourfirstskatingmarathon 4 doyouskateeveryday 5 whendidyougetyourfirstpairofskates 6 howlonghaveyoubeenskating no iskatedinamarathonlastyear b yes ido c forsixhours d sinceiwas7yearsold questions answers grammarfocus 1 howlonghaveyoubeenskating i vebeenskatingforfivehours 2 howlongdidyouskate iskatedfortwohours i vebeenskatingsincenineo clock i ve ihave ihavebeenskatingforfivehours 时态 现在完成进行时 构成形式 have hasbeen ving have has是助动词been是be的过去分词 表示从过去开始一直持续到现在的动作 现在可能仍在进行着 并有可能持续下去 你知道了吗 startedplayingtabletennis stoppedplaying playedtabletennis 1978 1997 2006 dengyapingplayedtabletennisfor19years hasbeenplayingbasketball 2006 1989 startedplayingbasketball yaominghasbeenplayingbasketballfor17years howlonghasyaomingbeenplayingbasketball howlongdiddengyapingplaytabletennis thepresentperfectprogressivetense 表示动作从过去某一时间开始 一直延续到现在 可能还要延续下去 常和表示一段时间的状语连用 theyhavebeenworkingfortwohours 他们已工作两小时了 for和表示一段时间的词组连用theyhavebeenrunningsincesixo clock 从6点起他们一直在跑 since和表示过去某一时刻的词或词组连用ihavebeenwaitingforyousinceicamehere 自到这儿以来我一直在等你 since后可跟句子 句子时态多用一般过去时 现在完成进心进行时 二 引导时间的介词for与since的区别 for与since引导的短语用howlong提问 for since 表示时间的持续 表示 自从过去某一时间点以来 for 时间段 since 时间点 强调一段时间 强调动作或状态一直延续到现在 用for和since填空 theyhavebeenlearningchinese theycametochina 2 ihaven tseenher alongtime 3 hehasbeenlivinghere 2001 4 shehasbeendoingherhomework twohours 5 it s5years weleftschool 6 howlonghasmarybeenateacher twoyearsago since for since for since since haveatry homework 1 howlonghaveyoubeenwearingglasses 2 howlonghaveyoubeenlivinginthetown 3 howlo