一般过去时

1.概念：过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。

2.时间状语：ago, yesterday, the day before yesterday, last week, last (year,night,month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time,etc.

3.基本结构：主语+动词的过去式或 be 的过去式+名词

4.否定形式：主语+was / were+not+其他;在行为动词前加didn't，同时还原行为动词。

5.一般疑问句：was 或 were 放于句首;用助动词 do 的过去式 did 提问，同时还原行为动词。

eg：①She often came to help us in those days.那些天她经常来帮助我们。②I didn't know you were so busy.我不知道你这么忙。