人教版八年级下册英语unit6课件.ppt.ppt

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1、Unit6Howlonghaveyoubeencollectingshells?wordscollectshellmarathonpairskatesinceHilltopschoolraiseseveralskater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．时态－现在完成进行时（一）构成形式：have/hasbeen+Vingfor+一段时间have/hasbeen+doingsth+since+过去的时间点sin

2、ce+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５年的英语了．IhavebeenlearningEnglishfor5years.例句2他已经集邮10年了．Hehasbeencollectingstampsfor10years.Hehasbeencollectingstampssince10yearsago.Hehasbeencollectingstampssince2002

3、.画线部分提问：Howlonghashebeencollectingstamps?引导时间的介词for与since的区别forsince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forfiveminutestendaysfiveyearssinceMay1,20038:00hewassevenyearsoldsevenyearsagoIstartedteachingEnglishin2010.IamstillteachingEnglishnow.How

4、longhaveyoubeenteachingEnglish?IhavebeenteachingEnglishfor2years.TeachEnglish2010HavebeenteachingEnglishnow2yearsTeachEnglish24yearsold(SinceIwas24.)samstartedskatingat9am.Heisstillskatingnow.Howlonghashebeenskating?Hehasbeenskatingfor4hours.skate9a.mHavebeenskatingnow1p.m4hoursskate(since9o’clo

5、ck.)Marystartedcleaningat7a.m.Sheisstillcleaningnow.Howlonghasshebeencleaning?Shehasbeencleaningfor30minutes.clean7a.mHavebeencleaning7:30a.m30minutescleanPairworkrun30minutes4hours3hours2hours1hourA:Howlonghashe/shebeen………?B:He/shehasbeen…….for…………Lindaplaysoccer45minutesHarryTomPlaypianoAliceP

6、laycomputerAlanWatchTVJimridewhoForwhatHowlongAlison5hours.SamLuNingLiChenToraisemoneyforcharity4hours4hours1hourRead3aandthenfillintheblanks.I’mtalkingtoyoufromtheHilltopSchoolSkatingMarathon.Here,studentsareskatingtoraisemoneyforcharity.Foreveryhourtheyskate,eachstudentraisestenyuanforcharity.

7、Theskatingmarathonhasbeengoingforfivehoursnow,andseveralskatersarestillskating.Alisonwasthefirstonetostart,andhasbeenskatingforthewholefivehours.NextisSam,andhehasbeenskatingforfourhours.LuNinghasbeenskatingforfourhourstoo,a