英语八年级下人教新目标版unit 6 how long have you been collecting shell课件.ppt

* 重点与难点： １．现在完成进行时 have / has been + Ving ２．引导时间的介词 　　for与since的使用 shell collect shells 收集贝壳 marathon skate a pair of skates She is skating. She is a skater. What is he doing? He is flying a kite. kite stamp 集邮 collect stamps raise money for charity Celia Victor I skated for four hours. Sam I’ve been skating for five hours. Alison How long? Listening 1b I’ve been skating for five hours. I skated for two hours. Listening — 2a Questions Answers __ 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? No, I skated in a marathon last year. b. Yes, I do. c. For six hours. d. Since I was 7 years old. √ √ √ √ I have been skating for five hours. 时态－现在完成进行时 have / has是助动词 been是be的过去分词 表示从过去开始一直持续到现在的动作， 并有可能持续下去． （一） 构成形式： have / has been + Ving 例句 1 我已经学了５年的英语了． I have been learning English for 5 years. 例句 2 他已经集邮10年了． He has been collecting stamps for 10 years. He has been collecting … since 10 years ago. He has been collecting … since 1995. 画线部分提问： How long has he been collecting stamps? （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” since + 时间点 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 ) 用for和since填空 They have been learning Chinese _____ they came to China. 2. I haven’t seen her _____ a long time. 3. He has been living here _____ 2001. 4. She has been doing her homework ____ two hours. 5. It’s 5 years _____ we left school. 6. – How long has Mary been a teacher? – _____ two years ago. since for since for since Since 1. Why are students skating? 2. How much does each student raise for every hour they skate? 3. How long has the skating marathon been going? 4. Who was the first to start? 5. How long has he been skating? 6. How long have Sam and Lu Ning been skating? 7. Who was