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1、八年级下英语学案第31课时【课题】：Unit 6 How long have you been collecting shells? . Section A (1a-2c)【励志小木屋】：Good habits are the best friends of man. 良好的习惯是益友【学习目标】：知识目标 1.识记并会运用单词collect, shell, pair, skate, since2.理解并运用短语 for five years, a pair of.3. 掌握并运用句型(1) - How long have you been skating ? - I have been sk
2、ating for five hours. (2) - How long have you been skating ? - I have been skating since I was seven years old.能力目标：能用新句型进行对话，了解完成时态的用法。情感目标：培养学生们的交际能力，以及相互帮助和合作的能力。【学习重难点】：重点：现在完成时态的构成及用法，标志词.难点：have /has been and have/has gone 的区别.一、自主预习（一） 预习任务Task One 预习本单元的单词 1）个人自读，记忆本课单词2）小组互相检查单词读的情况收集_ 贝壳_
3、一双 _溜冰鞋_ 自从_马拉松赛跑 _ 一双溜冰鞋 _ 在马拉松赛中 _Task Two：自主预习1b,2a,2b的听力1试译以下句子Ive been skating for five hours._I skated for four hours._2 以上两个句子有什么区别_3拓展练习 a. 自从八点开始，我就已经滑冰了。_b. 我读过这本书._c. 我收集贝壳已经两年了。_Task Three ：how 的相关词组:how_多少（钱） how _多少(人) how_多远 how _多久一次 how_多大 how _ 多久以后（二）预习诊断. 从B栏中找出A栏相应的答语 A1 How lon
4、g has Alison been skating?2 How long did Sam skate?3 Was this your first skating marathon ?4 Do you skate every day ?5 When did you get your first pair of skates ?BA . Yes , I do.B . No, Iskated in a marathon last year.C . She has been skating for five hours.D . On my tenth birthday.E . He skated fo
5、r four hours.（三）预习反思 Do you have any questions ?二课中实施Step 1 预习交流-精讲点拨1. - How long have you been collecting shells? - I have been skating since I was seven years old.(1) how long意为“多长时间”，对时间段提问，常用for+时间段或since . 等表示一段时间的短语回答，for+时间段= since+时间段+ago 。例如：for five years = since five years ago(2) how lon
6、g还可以对物体长度进行提问。例如：How long is the river?2. since I was 7 years old . 自从我七岁以来。(1) Since 作conj.时，意为“自从；自以来”，用来引导时间状语从句。Since从句常用过去时，主句常用完成时。 My father has taught here since he left school.(3) 作prep.时，意为“自从；自以来”，后接表示过去时间点的名词。She has been ill since 1999.Step2 Warming-up Step 3 Lead-in Step4 PairworkStep
7、5 拓展延伸：用所给词的适当形式填空。 run, collect, for, since, pair1. My hobby is _ shells.2. Mom, my shoes are old. Could you buy me a new _ ?3. She has been playing the piano _ she was 4 years old.4. Ive been studying English _ over 5 years.5. Was this your first _ marathon ?Step 6 系统总结三、限时作业 满分 10 分 得分 _1. There
8、are many beautiful s_ on the beach.2. I have lived in Los Angeles s_ I was born.3. Shes going to buy a p_ of shoes.4. The boy likes c_ stamps.5. - _ shall we start for Shanghai ? - At eight oclock tomorrow morning .A. How long B. When C. How soon6. - _ have you been standing here ? - For half an hou
9、r.A. When B. Where C. How long7. - _ you _ to the party yesterday? - Yes, I did. A. Did ; go B. Have; been C. Do; go8. There _ a pair of shoes under the bed. A. is B. are C. were9. _ (滑冰) is good for health.10. He played computer games for 3 hours.(对划线部分提问) _ _ _ he play computer games?学后反思：- 2 -用心 爱心 专心
