精选优质文档-倾情为你奉上人教版八年级下册过去进行时 语法讲解1构成： was/weredoing2用法： 过去进行时主要表示过去某一时间或某一段时间正在进行的动作。如：His father fell and hurt himself while he was riding his bicycle.他爸爸骑自行车时摔了下来，受伤了。3常用时间状语： this morning, the whole morning, all day, yesterday, from nine to ten, last morning, when, while等。4when与while的区别(1)引导时间状语从句时，while连接的是时间段，而when连接的多是时间点。如：What was your father doing while your mother was cooking？你妈妈做饭时，你爸爸在干什么呢？What was your mother doing when you came back?当你回来时，你妈妈在干什么呢？(
