How long have you been collecting shells?Unit 61. 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.What are you doing? I am skating.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.collect stampsswimmingstudyplay the pianoPAIRWORK1b Listening How long? AlisonSamVictor Celia Ive been skating for five hours.I skated for four hours.Ive been skating for five hours.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.2a Listening 1. How long did you skate today? 1. How long did you skate today? 2. How long have you been skating 2. How long have you been skating today?today? 3. Was this your first skating marathon? 3. Was this your first skating marathon? 4. Do you skate every day? 4. Do you skate every day? 5. When did you get your first 5. When did you get your first pairpair of of skateskates?s? 6. How long have you been skating? 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 ListeningAnswersa. No, I skated in a marathon last year.b. Yes, I do.c. For six hours.d. Since I was seven years old.1. 现在完成进行时现在完成进行时:表示从过去开始一直表示从过去开始一直持续到现在的工作持续到现在的工作,这个动作可能刚结这个动作可能刚结束束,也可能还要继续下去也可能还要继续下去,常与常与for two hours, since 1998, all this morning, these few days等表示一段时间的状语连用。等表示一段时间的状语连用。Explanation 现在完成进行时的构成现在完成进行时的构成: have / has been (现在分词现在分词) doing, 否定形式为否定形式为:have / has not been doing,一般疑问句构成一般疑问句构成:Have/Has sb. been doing sth.? 特殊疑问句形式特殊疑问句形式(询问持续时间长短询问持续时间长短): How long have/has sb. been doing sth.?例例: 1). I have been cleaning the room all this morning. 我今天一上午都在打扫房间。我今天一上午都在打扫房间。 2). Ive been studying English since I was 4 years old. 自从自从4岁起我就一直学英语。岁起我就一直学英语。 3). He has been living in the street for about 20 years. 他一直在这条街住了近他一直在这条街住了近20年了。年了。常和表示一段时间的状语连用。常和表示一段时间的状语连用。They have been working for two hours. 他他们已工作两小时了。们已工作两小时了。for和表示一段时间的词组连用和表示一段时间的词组连用They have been running since six oclock. 从从6点起他们一直在跑点起他们一直在跑。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。自到这儿以来我一直在等你。since后可跟句子后可跟句子,句子时态多用一般过去时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 life1980was born1989started playing basketballhas been playing16 years2006 playsHe started playing basketball in 1989. He has been playing basketball since 1989. He has been playing basketball for 16 years.David1970: born in the U.S.A1999now: teach English How long has David been teaching English?He has been teaching English since 1999.He has been teaching English for 10 years.How long has David been teaching English?He has been teaching English since 10 years ago. He has been teaching English since he was 29.1. Mr Green _ in China since five years ago. A. livedB. has livedC. lives D. is going to live 2. is the meeting going to last? About twenty minutes. A. How far B. How soon C. How long D. How often 3. I have been skating _ two hours.A. in B. at C. for D. since 4. If I _ enough money, I _a hospital for patients. A. will have, build B. will have, will build C. have, will build D. have, build5. Hes been collecting shells _ he was ten years old. A. when B. while C. andD. sinceMake up a dialogue with your partner. Talk about your hobby. (How longsince for)HomeworkThank you Thank you for for listening! listening!