人教版八年级英语下册Unit6课件VIP免费

•1)since+过去一个时间点(如具体的年、月、日、时间点、1980,lastmonth,halfpastsix)。Ihavebeenheresince1989.2)since+从句（从句用过去式）ItistwoyearssinceIbecameastudent.•3)since+一段时间+agoIhavebeenskatingsincefiveminutesago.•Ihavebeenskatingforfiveminutes.用for和since填空1.TheyhavebeenlearningChinese_____theycametoChina.2.Ihaven’tseenher_____alongtime.3.Hehasbeenlivinghere_____2001.4.Shehasbeendoingherhomework____twohours.5.Sarahhasbeensleeping_____9:00.6.–HowlonghasMarybeenateacher?–_____twoyearsago.sinceforsinceforsinceSince2aListentotheinterviewwiththeskatingmarathonwinnerandcheckthequestionsyouhear.QuestionsAnswers1.Howlongdidyouskatetoday?a.No,Iskatedinamarathonlastyear.2.Howlonghaveyoubeenskatingtoday?b.Yes,Ido.3.Wasthisyourfirstskatingmarathon?c.Forsixhours.4.Doyouskateeveryday?5.Whendidyougetyourfirstpairofskates?d.SinceIwassevenyearsold.6.Howlonghaveyoubeenskating?LiYuchun1987~2013:singHowlonghasshebeensinging?Shehasbeensingingfor26years.since1987.成龙(JackieChan)1961~now:actHehasbeenactingfor52years.HowlonghasJackieChanbeenacting?Hehasbeenactingsince1961.Howlonghasshebeendancing?Shehasbeendancingfor3hours.since3hoursago.3hours45minutesHowlonghasshebeenlearning?Shehasbeenlearningfor45minutes.since45minutesago.Howlonghasshebeenplayingcomputer?(fourhours)Shehasbeenplayingcomputerforfourhours.Howlonghashebeenplayingbaseball?(twohours)Hehasbeenplayingbaseballfortwohours.Howlonghavetheybeenworking?(aweek)Theyhavebeenworkingforaweek.Howlonghashebeenridingamotorcycle?(tenhours)Hehasbeenridingitfortenhours.A:Howlonghaveyoubeenplayingsoccer?B:I’vebeenplayingsoccerfortwohours.havebeenNow:3:00pmStart:1:00pmIlikeplayingsoccerIstartedplayingsoccerat1:00pm.I’mstillplayingsoccernow.•IstartedteachingEnglishin2004.•IamstillteachingEnglishnow.•HowlonghaveyoubeenteachingEnglish?IhavebeenteachingEnglishfor5years.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.Hehasbeencollectingstampssince1999.画线部分提问：Howlonghashebeencollectingstamps?（二）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+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)成龙（JackieChan）wasborn:1954act:1961~nowHehasbeenactingfor48years.HowlonghasJackieChanbeenacting?Hehasbeenactingsincehewas7yearsold.Hehasbeenactingsince1961.Traceywasborn:1981learnEnglish:1994~nowHowlonghasTraceybeenlearningEnglish?ShehasbeenlearningEnglishsince1994.ShehasbeenlearningEnglishfor15years.ShehasbeenlearningEnglishsinceshewas13.ShehasbeenlearningEnglishsince15yearsago.Linda/30minutesHarry/45minutesAlice4hoursAlan/3hours2years1hourA:Howlonghashe/shebeen………?B:He/she’sbeen…….for…………1b.Listen.Areporteristalkingtotheparticipantsinaskatingmarathon.Fillinthechartbelow.Howlong?AlisonI’vebeenskatingforfivehours.SamIskatedforfourhours.VictorCeliaI’vebeenskatingforfivehours.Iskatedfortwohours.PairworkA:HowlonghasAlisonbeenskating?B:She’sbeenskatingforfivehours.A:HowlongdidSamskate?B:Heskatedforfourhours.7.Ihavebeenpracticingthepiano____10:30.8.Mariciahasbeenrunning____...