最新外研版英语九年级下册Module5 Unit 3(13)

最新外研版英语九年级下册Module5 Unit3

过去进行时用法：过去某一时刻或某一段时间内正在 发生的动作。 常用时间状语：at this time yesterday, at that time, at ten o’clock yesterday或when 引导的从句。 动词构成： was / were+现在分词(--ing) 以work为例：was / were working 否定构成： was / were not + 现在分词