Unit 5 Section B 3a-Selfcheck 课件 2023-2024学年人教版八年级英语下册

Unit 5 What were you doing when the rainstorm came? Section B 3a-Self Check What was/were sb. doing when you got home? twin brothers father mother Lead in 1. 感觉像 2. 首先 3. 入睡 4. 逐渐变弱 5. 确信 6. 醒来 7. 凌乱 8. 清洁 9. 互相帮助 10. 在困难时期 feel like at first fall asleep die down make sure wake up in a mess clean up help each other in times of difficulty Review the expressions and sentences. Thinking: 过去进行时及when while 的区别。 Discussion 1. 概念: 表示过去某个时刻或过去一段时 间正在进行的动作。 2. 句子结构: 主语 + was/were + doing sth. + 时间状语 3. 时间状语词: at 5:00 yesterday afternoon, at that time, at that moment, then, at this time yesterday等连用, 或者用时间状语从句来表示过去的时间。如: They were playing basketball when she arrived. While they were playing basketball, she arrived. 区别: 1. 由when引导的时间状语从句,表示时间点,主句用过去进行时,从句应用一般过去时; 由while引导的时间状语从句,表示时间段,主句用一般过去时,从句应用过去进行时。 When the teacher came in, we were talking. 当此句改变主从句的位置时,则为: While we were talking, the teacher came in. 2. when, while 2. 如果从句和主句的动作同时发生,两句都用过去进行时的时候,多用while引导。如: They were singing while we were dancing. 3. 过去进行时现在进行时和一般过去时的区别 过去进行时 现在进行时 一般过去时 基本用法 表示在过去的某一时刻或某一时间正在进行的动作。 表示现在正在进行的动作。 过去某个时间发生过的动作或存在的状态。 结构形式 主语 + was/were + V-ing形式 is/am/are + V-ing形式 主语 + 动词过去式 时间状语 At7:00yesterday, at that time, this time last night等;when与while引导的时间状语从句。 now, look, listen等。 yesterday, last week, in 1993, once, before, a few days ago等。 友情提示 表示一个过去正在进行而可能尚未完成的动作。 表示一个此刻正在进行而可能尚未完成的动作。 表示过去已经完成的动作。 1 Fill in the blanks with when or while. 1. _ I was walking home from school, I saw a strange light in the sky. But _ I pointed it out to my friend, it went away. 2. _ I told my older brother about the strange light in the sky, he just laughed and didn’t believe me. 3. _ my brother was laughing, the television news reported that other people had seen the light as well. While when When While 2 Fill in the blanks with the correct forms of the words in brackets. When I_ (be) in the sixth grade, I_(join) a piano competition. I _(practice) for four hours every day and my piano teacher _(come) three tim