Unit 8 Have you read Treasure Island yet？现在完成时的定义、标志词（教案）

教师姓名 单位名称 填写时间
学科 英语 年级/册 八年级下册 教材版本 人教
课题名称 人教版新目标八年级下 Unit8 现在完成时的定义、标志词
难点名称 现在完成时的定义及标志词
难点分析 从知识角度分析为什么难 现在完成时的定义很难理解，常和一般过去时混淆，标志词since和for后面接的词容易弄错
从学生角度分析为什么难 学生的理解能力不是很强，现在完成时的定义对于他们来说很难理解
难点教学方法 通过句子归纳、总结出现在完成时的定义及标志词
教学环节 教学过程
导入 在电子白板上快速显示一个动词do/have，然后让同学说出did、done，had,引入现在完成时。
知识讲解（难点突破） 一、定义①持续性表示从过去开始一直持续到现在的动作或状态。I have been a teacher for two years.I have lived in China since I was born.②影响性表示过去已经发生的动作对现在造成某种影响。I have already had lunch.(I am not hungry.)我已经吃过午饭了。(现在不饿了)！③频率性I have read this novel twice.I have never read this novel.表示到目前为止动作发生的次数。二、标志词持续性①for+时间段I have studied English for six years.②since+过去的时间点，意为"自从"。I haven't seen him since 2005.Tom has taught here since he graduated.影响性①already，意为"已经"We have already finished our homework.②just,意为"刚刚"I have just had breakfast.③yet,意为"还″(用于疑问句和否定句)Have you cleaned the room yet They haven't decided yet.频率性① ever,意为“曾经”Have you ever cooked at home？②never,意为"从来没有"I have never seen such a good film.③twice,many times等Mary has read the book twice。
课堂练习（难点巩固） 1.Lily is my classmate. We each other since she came to our school.A. know B. knew C. have known D. will know2.I the film yet. A. have seen B. haven't seen C. didn't see D. won't see3. Ice Age is a very nice film and I ______it twice.A. will see B. seeC. would see D. have seen4 Miss Brown, we ______ cleaning our classroom. Can we go home now A. finish B. has finishedC. are finishing D. have finished
小结 一、定义持续性 影响性 频率性二、标志词for,since,already,just,yet,ever,never,twice...