Unit 3 现在完成进行时公开课课件 -2022-2023学年高中英语牛津译林版（2020）选择性必修第二册

Unit 2 Grammar and usage Present Perfect Continuous Tense 现在完成进行时 To learn the present perfect continuous tense; To practice the present perfect continuous tense by finishing some exercises. Thinking 1. The boy started eating five minutes ago. 2. He is still eating now. The boy _ (eat) since five minutes ago. The Present Perfect Continuous Tense 现在完成进行时 1. 定义 2. 构成 3. 基本用法 现在完成进行时 定义 现在完成进行时表示动作从过去某一时间开始,一直持续到现在,或者刚刚终止,或者可能还要继续进行下去。 past future now do do 现在完成进行时 do 1. I have been learning English since I was 8 years old and I still love it. 2. It has been raining these days. 3. He hasn't been using the car for the last two months. 4. Have they been waiting for you for half an hour? 构成 ①肯定句: ②否定句: ③一般疑问句: 主语+has/have been doing+其他 主语+has/have not been doing+其他 Has/Have+主语+been doing+其他? 注意:不用被动语态 1. The boy started eating five minutes ago. 2. He is still eating now. The boy _ (eat) since five minutes ago. has been eating 现在完成进行时的用法 1 1. I have been learning English since I was 8 years o