问题描述: My mother was cooking when my father came back 用While改写 1个回答 分类:英语 2014-11-16 问题解答: 我来补答 My mother was cooking while my father was entering the door.While 一般是同时发生的事情.也有一边一边的意思.I was sweeping the floor while singing. 展开全文阅读