英语人教版八年级下册Unit5 SectionA Grammar-4c.pptVIP

3. When we arrived at the restaurant, we saw that it was closed. 主句为瞬间动作，从句中的 动作 时态为 ，只能由 引导。 从句若在主句之前，用逗号隔开。 瞬间 when 一般过去时 4. 1). While we were talking, the teacher came in. 2). The teacher came in, while we were talking. 3). I met my friend Jim when I was walking in the street. 4). When I was walking in the street, I met my friend Jim. 主句为瞬间动作时，从句中的 动作 既可以由 引导，也可有由 引导。 从句若在主句之前，用逗号隔开。 延续性 while when When/while 小结 当一个为瞬间动作，一个为延续性动作时， 瞬间动作只能由 引导， 延续性动作 和 都可以引导。 当两个都是延续性动作时，只能由 来引导。 while when while when 3 4 5 “ ” “ ” Unit5 What were you doing when the rainstorm came? Section A (Grammar-4c) 湖北省十堰市东风七中 谢晋 Make sentences one by one with when/while.(句子接龙) Warming up Make conversations in pairs  with the Past Progressive Tense Check homework on-line She were doing housework when I was doing my homework. What were you doing at this time yesterday?I was doing my homework. What were your mother doing while you were doing your homework? 1 2 3 4 5 Watch a video：What happened? A disaster(灾难) took place in America. There were tornados(龙卷风) coming. Luckily, it was OK in China. What were the famous persons doing at that time? Guessing He was exercising. What was Lu Han doing at the time of the tornado? What was she doing while Lu Han was exercising ? She was drinking water. She was reading in the library. What was she doing when the tornado came? He was running. What was Yao Ming doing when the disaster came ? What were they doing at the time of the tornado? They were cooking at home. 1 2 3 4 5 探究一 Review the Past progressive tense 过去进行时 过去某时刻或某时段正在发生的动作 at 8 yesterday , at that time, from 6 to 9 p.m., when/while 时间状语从句 am/is/are 1.含义： 过去进行时表示 。 2.时间状语： 。 3.基本结构： 现在进行时： +动词-ing 过去进行时： +动词-i