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）　　
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
祝开心~