牛津深圳版八年级下册英语期末复习Unit8单元总结附答案 四、用法 1、表示过去时间内正在发生的动作或发生 的状态 I was reading a novel at that time. 2、表过去某个动作发生时或发生后，另一过去动作正在进行。也可表过去一段时间内持续发生的 动作 While we were watching TV, the lights went out. 3、表两个过去动作同时进行（可用 while 连接） I was eating while my mother was riding. While he was waiting for the bus, he was reading a newspaper. 4、没有明显时间或时间状语的语境题 What’s the matter? You look sad. Oh, nothing much, I was thing of my old friends back home. 5、宾语从句中现在进行时变成过去进行时 He said he was eating chips at 9 o’clock yesterday evening.