1、一般过去式句子的结构： 主语 + 动词过去式（ be 动词的过去式/ 行为动词的过去式）。

2、如： She was a student two years ago. We were on the farm last week.We sang at the party yesterday.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 ①Did+主语+do+其他，②Was\Were+主语+ do sth。