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Unit6Howlonghaveyoubeencollectingshells?,words,collectshellmarathonpairskatesinceHilltopschoolraiseseveralskater,收集；搜集贝壳；壳马拉松赛跑；马拉式活动一对；一双溜冰鞋自从；自以来山顶学校筹集；筹募几个的；数个的溜冰者,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，并有可能持续下去,构成形式：,have/hasbeen+Ving,for+一段时间have/hasbeen+doingsth+since+过去的时间点since+从句(一般过去时),与过去时的比较：1.IwatchedTVforthreehours.我看了三小时的电视（我现在没有看电视了）2.IhavebeenwatchingTVforthreehours.我看了三小时的电视（我现在仍然在看电视）,例句1,我已经学了年的英语了,IhavebeenlearningEnglishfor5years.,例句2,他已经集邮10年了,Hehasbeencollectingstampsfor10years.,Hehasbeencollectingstampssince10yearsago.,Hehasbeencollectingstampssince2002.,画线部分提问：,Howlonghashebeencollectingstamps?,for,since,表示时间的持续,for+时间段,表示“自从过去某一时间点以来”,since+过去的时间点,强调一段时间,强调动作或状态一直延续到现在,(for与since引导的短语用howlong提问),从句,for,fiveminutestendaysfiveyears,since,May1,2003,8:00,hewassevenyearsold,sevenyearsago,IstartedteachingEnglishin2010.,IamstillteachingEnglishnow.,HowlonghaveyoubeenteachingEnglish?,IhavebeenteachingEnglish,for2years.,TeachEnglish,2010,HavebeenteachingEnglish,now,2years,TeachEnglish,24yearsold,(SinceIwas24.),samstartedskatingat9am.,Heisstillskatingnow.,Howlonghashebeenskating?,Hehasbeenskating,for4hours.,skate,9a.m,Havebeenskating,now1p.m,4hours,skate,(since9oclock.),Marystartedcleaningat7a.m.,Sheisstillcleaningnow.,Howlonghasshebeencleaning?,Shehasbeencleaning,for30minutes.,clean,7a.m,Havebeencleaning,7:30a.m,30minutes,clean,Pairwork,run30minutes,4hours,3hours,2hours,1hour,A:Howlonghashe/shebeen?,B:He/shehasbeen.for,Linda,playsoccer45minutes,Harry,Tom,Playpiano,Alice,Playcomputer,Alan,WatchTV,Jim,ride,Sam,LuNing,LiChen,Toraisemoneyforcharity,4hours,4hours,1hour,Read3aandthenfillintheblanks.,1b.Listen.Areporteristalkingtotheparticipantsinaskatingmarathon.Fillinthechartbelow.,Alison,Sam,Victor,Celia,Ivebeenskatingforfivehours.,Iskatedfortwohours.,Howlonghasbeenskating?,He/Shehasbeenskatingfor,Howlongdidskate?,He/Sheskatedfor,2aListentotheinterviewwiththeskatingmarathonwinnerandcheckthequestionsyouhear.,I.Writethequestions:1_Hehasbeenstandingthereforfourhours.2_IhavebeenridingabikesinceIwastenyearsold.3_Shehasbeenwalkingforfivehours.4._IvebeenwatchingTVsince7:00.5._Hesbeenwaitingforthetrainforanhour.,Homework,
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