八年级英语How long have you been collecting shells.ppt

1、Unit 6How long have you been collecting shells?shellcollect shells收集贝壳收集贝壳marathonskatea pair of skatesShe is skating.She is a skater.I started teaching English in 2000.I am still teaching English now.How long have I been teaching English?I have been teaching English for 8 years.since 2000.since:(pr

2、ep)自.以来 How long has she been skating?1999-2008She has been skating for nine years.关颖珊关颖珊She is skating.滑冰滑冰2 hoursHow long has she beenreading?She has been reading for 2 hours.since2 hours ago.an hourHow long have they been swimming?They have been swimmingfor an hour.since an hour ago.15 minutesHow

3、 long has he been drawing a picture?He has been drawing a picture for 15 minutes.since 15 minutes ago.Yaoming is playing basketball.2003-2008Yaoming has been playing basketballfor five years.How long has Yaoming been playing basketball?since five years ago成龙（成龙（Jackie Chan）1954:be born1961now:actHe

4、has been acting for 47 years.How long has Jackie Chan been acting?He has been acting since he was 7 years old.He has been acting since 1961.Miss Li1975:be born20012008:teach ChineseHow long has Miss Li been teaching Chinese?She has been teaching Chinese for 7 years.She has been teaching Chinese sinc

5、e 2001.She has been teaching Chinese since 7years ago.Deng Yaping 1973:be born1978 1997:play table tennisHow long did Deng Yaping play table tennis?She played table tennis for 19 years.（二）（二）引导时间的介词引导时间的介词forfor与与sincesince的区别的区别forsince表示时间的持续表示时间的持续for+for+时间段时间段表示表示“自从过去某自从过去某一时间点以来一时间点以来”since+s

6、ince+时间点时间点强调一段时间强调一段时间强调动作或状态强调动作或状态一直延续到现在一直延续到现在(for与与since引导的短语用引导的短语用how long提问提问)1b Listen.A report is talking to the participants in a skating marathon.Fill in the below.How long?AlisonIve been skating for five hours.SamI skated for four hours.VictorCeliaIve been skating for five hours.I skat

7、ed for two hours.1c PAIRWORKAsk and answer questions about the people in the picture.A:How long has Alison been skating?B:Shes been skating for five hours.A:How long did Sam skate?B:He skated for four hours.Listening 2a&2bQuestionsAnswers_ 1.How long did you skate today?_ 2.How long have you been sk

8、ating today?_ 3.Was this your first skating marathon?_ 4.Do you skate every day?_ 5.When did you get your first pair of skates?_ 6.How long have you been skating?a.No,I skated in a marathon last year.b.Yes,I do.c.For six hours.d.Since I was 7 years old.现在完成进行时现在完成进行时 当我们谈论动作从当我们谈论动作从过去某一时间开始一直延续到现在过

9、去某一时间开始一直延续到现在,并且有可能持续下去时，我们常常用以下句型来表示并且有可能持续下去时，我们常常用以下句型来表示:for+一段时间一段时间have/has been+doing sth+since+过去的时间点过去的时间点 since+从句从句(一般过去时一般过去时)have/has是助动词是助动词,been是是be的过去分词的过去分词 eg.How long have you been swimming?I have been swimming for 3 years.How long has she been skating?She has been skating since

10、nine oclock.Yao Mings sports life1980was born1989started playing basketballhas been playing19 yearsHe started playing basketball in 1989.He has been playing basketball since 1989.He has been playing basketball for 19 years.2008plays1978 19972008started playing table tennis stoppedplaying 19892008 ha

11、s been playing basketballstarted playing basketballDeng Yaping played table tennis for 19 years.Yao Ming has been playing basketball for 19 years.played table tennisGrammar focusHow long have you been skating?Ive been skating since nine oclock.Ive been skating for five hours.How long did you skate?I

12、 skated for two hours.用用forfor和和sincesince填空填空1.They have been learning Chinese _they came to China.2.I havent seen her _ a long time.3.He has been living here _ 2001.4.She has been doing her homework _two hours.5.Its 5 years _ we left school.6.How long has Mary been a teacher?_ two years ago.sinceforsinceforsinceSince