3. collect shells/ k ə' lekt / (v.) two pairs of skates (n.) /pe ər / go skating (v.) skating marathon (v.) skater (n.) since I was 7 years old /sins/ since nine o’clock since 7 years ago 收集贝壳 两双溜冰鞋 溜冰 溜冰马拉松 溜冰者 自从我 7 岁 自从九点 自从７年前 Learn by yourself 比一比，看谁记得 快 勇敢的你 不会 就问

4. shellcollect shells

5. skate skates a pair of skates

6. skate go skating She is a skater.

7. marathon （ n. ） 马拉松

8. （二） 引导时间的介词 for 与 since 的区别 for since 表示时间的持续 for + 时间段 表示 “ 自从过去某一 时间点以来 ” 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 how long 提问 ) since…+ 一个时间点 + 一段时间 +ago + 从句

9. 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 They have been running since six o’clock. 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

10. 区别：过去时与现在完成进行时 过去时表示在过去某个时间发生过的动作 或存在的状态，和现在不发生联系。而现 在完成进行时一直延续到现在或将来。 For example:He lived here in 1992 1992 年他住在这里。（不涉及现在他是否 还住在这里。） He has been living here since he was born 从他出生就一直住在这。（现在可能到将来 仍住在这）

11. 1. How l_____ have you been collecting stamps? 2. I have been skating s______ two years ago. 3. He won the first prize in a 40-kilometer m_________ last year. 4. How many _______( 贝壳 ) have you been ________( 收集 ) ? 5. My ________( 滑冰鞋 ) are worn out, and I want to buy a new ________( 一双 ). ong ince arathon shells collecting skates pair Fill in the blacks with the correct words:

12. 1.He has been collecting kites for 5 years. ( 提问 ) _____ _____ _____ he been collecting kites? 2. I have been away from home for 12 years 。 ( 同义句 ) I have been away from home _____ 12 years _____. 3.Sam has been skating for four hours. ( 否定句 ) Sam _______ _______ skating for four hours. 4. We played basketball two hours ago. ( 改为现在完成进行时 ). We _____ ______ ______ basketball _____ two hours. 5. Jack started skating 5 years old.( 对画线部分提问 ) _______ ______Jack______skating? How long has since ago hasn’t been have been playing for When did start

13. School Skating Marathon 马拉松赛跑 Alison Victor Sam Celia

14. 1b Listen. A reporter is talking to the participants in a skating marathon. Fill in the chart below. How long ? AlisonI’ve been skating for five hours. SamI skated for four hours. Victor Celia I’ve been skating for five hours. I skated for two hours.

15. Reporter: Alison, how long have you been skating? Alison: I’ve been skating for five hours. Reporter : Wow! Sam, how long did you skate? Sam: I skated for four hours. I started at nine o’clock in the morning and stopped at one o’clock in the afternoon. I’m very tired! Reporter : When did you start skating, Victor? Victor: At nine o’clock. Reporter : So you’ve been skating for … Victor: I’ve been skating for five hours. Reporter : How long did you skate, Celia? Celia: Umm, let’s see … I skated for two hours.

16. 2a Listen to the interview with the skating marathon winner and check the questions you hear: __ 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?

17. 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 Listen again. Draw lines to match the questions with answers in activity 2a. 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.

18. Reporter: Alison, congratulations on winning the skating marathon! Alison: Thank you. Reporter: So, How long did you skate today? Alison: For six hours! Reporter: Was this your first skating marathon? Alison: No, I skated in a marathon last year. Reporter: you’re an excellent skater, Alison. Do you skate every day? Alison: Yes, I do. Reporter: How long have you been skating? Alison: Since I was seven years old. I got my first pair of skates on my birthday from my grandmother …….

19. GROUPWORK 1 Make a survey. Interview your classmates. Ask them what hobbies they have. A : Hi, may I ask you some questions? B: Sure. A: What’s your favorite sport? (your hobby) B: …. A: When did you start…? B: …. A: How long have you been…? …

20. Home work Words and sentences 3H