unit6howlonghaveyoubeencollectingshells引入

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1、Unit6Howlonghaveyoubeencollectingshells?2000now(2013)startedtoteachEnglishin2000havebeenteachingEnglish13yearsIamstillteachingEnglishnow.HowlonghaveIbeenteachingEnglish?IhavebeenteachingEnglishfor13yearssince2000since13yearsago.sinceIwas22yearsold.YaoMing’ssportslife1980w

2、asborn1989startedplayingbasketballhasbeenplaying24years2013playsHestartedplayingbasketballin1989.Hehasbeenplayingbasketballfor24years.2hoursHowlonghasshebeenreading?Shehasbeenreadingfor2hours.=since2hoursago.=since7:30=sinceclassbegan.Howlonghavetheybeenplayingsoccer?They

3、havebeenplayingsoccerforhalfanhour.sincehalfanhourago.halfanhour成龙(JackieChan)beborn:1954act:1961~nowHowlonghasJackieChanbeenacting?Hehasbeenactingfor50years.since1961.50yearsago.hewas7yearsold.定义：表示某动作从过去开始，一直延续到现在经历了多长时间,常有可能持续下去,常和表示一段时间的状语连用。此时态包含现在进行时的含义，也包含现在完成时的含义。

4、时间状语:1.for+一段时间2.since+一段时间ago3.since+过去的时间点4.since+一般过去时的句子构成：have/hasbeen+V-ing+……现在完成进行时have/has是助动词been是be的过去分词I’vebeenstudyingEnglishfortwoyears.I’vebeenstudyingEnglishsincetwoyearsago.=since2011.Hehasbeencollectingshellssincehewasten.Been---be的过去分词现在完成进行时:have/hasbe

5、en+doing.表示动作持续了多久．并仍在进行中与过去时的比较：１Iwatchedtvforthreehours.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）Hehasbeenswimmingsincefouro’clock.他从四点起一直在游泳。(现在还在游)Heswamatfouro’clock.四点钟他在游泳。(不涉及现在是否还在游)Fillintheblankwithfororsince1.Lanahasbeenrunn

6、ing____15minutes2.Tomhasbeensleeping_____9:00.3.Hehasbeenlivinghere_____2001.4.Shehasbeendoingherhomework____twohours.5.IhavebeenwatchingTV____10minutes.6.–HowlonghasMarybeenateacher?–_____twoyearsago.HaveatryforsincesinceSinceforfor用for和since填空TheyhavebeenlearningChinese

7、_____theycametoChina.2.Ihaven’tseenher_____alongtime.3.Hehasbeenlivinghere_____2001.4.Shehasbeendoingherhomework____twohours.5.It’s5years_____weleftschool.6.–HowlonghasMarybeenateacher?–_____twoyearsago.HaveatrysinceforsinceforsinceSinceChoosethebestanswerforeachblank1.I’

8、vebeenskating__threehourstoday.A.aboutB.forC.since2.We’vebeenstudyingEnglish__twoyearsago.A.forB