was怎么读,did怎么读

5《unit 1 i was two then》ppt课件1_word文档在线阅读与下载_无忧
was后面动词什么形式
what was he doing when they swam in the water he was doing
b:i was what about you?
人教七年级下册unit11 how was your school trip单词用法及课文重点