新目标人教版初中英语八年级下册《Unit6Howlonghaveyoubeencollectingshells》精品课件.ppt

,a: i collect shells because they are beautiful.,how long have you been collecting shells?,unit 6,id like to collect stamps because they are interesting.,8枚不同年的罗斯福银币,section a,1. how long did you sleep last night?,for eight hours.,2. when did you start class today?,at seven forty-five.,3. how long have you been in class today?,i have been in class for one hour.,skate,a pair of skates,she is skating.,she is a skater.,1b listening,ive skating for hours.,i for four hours.,ive been skating for hours.,i skated for,five,been,skated,five,two hours,tapescript,woman: alison, how long have you been skating? alison: ive been skating for five hours. woman: wow! sam, how long did you skate?,sam: i skated for four hours. i started at nine oclock in the morning and stopped at one oclock in the afternoon. im very tired! woman: when did you start skating, victor? victor: at nine oclock.,woman: so youve been skating for victor: ive been skating for five hours. woman: how long did you skate, celia? celia: umm, lets see i skated for two hours.,1c pairwork ask 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.,1b listening,ive skating for hours.,i for four hours.,ive been skating for hours.,i skated for,five,been,skated,five,two hours,2a listening,1. how long did you skate today? 2. how long have you been skating 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?,questions 1. how long did you skate today? 2. how long have you been skating 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?,2b listening,answers a. no, i skated in a marathon last year. b. yes, i do. c. for six hours. d. since i was seven years old.,2c pairwork,a: how long have you been skating?,b: ive been skating since i was seven years old.,how long have you been skating? ive been skating since nine oclock. ive been skating for five hours.,how long did you skate?,i skated for two hours.,表示动作从过去某一时间开始, 一直延续到现在,可能还要延续下去。常和表示一段时间的状语连用。 they have been working for two hours. 他们已工作两小时了。 for和表示一段时间的词组连用,现在完成进行时,they have been running since six oclock. 从6点起他们一直在跑。 since 和表示过去某一时刻的词或词组连用 i have been waiting for you since i came here. 自到这儿以来我一直在等你。 since后可跟句子,句子时态多用一般过去时,when did yao ming start playing basketball? how long has yao ming been playing basketball?,yao mings sports life,he started playing basketball in 1989. he has been playing basketball since 1989. he has been playing basketball for 20 years.,wang lei 1990: born in beijing 1999now: learn english,how long has wang lei been learning english? she has been learning english since 1999. she has been learning english for 10 years.,how long has wan