does,同时,还原行为动词. 二,一般过去时: 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. 时间状语:ago, yesterday, the day before yesterday, last week(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc. 基本结构:①be 动词;②行为动词 否定形式:①was/were+not;②在行为动词前加 didn’t,同时还原行为动词. 一般疑问句:①was 或 were 放于句首;②用助动词 do 的过去式