你那时正在做什么 用英语怎么说
问题描述：
你那时正在做什么 用英语怎么说
答
When xxx,what were you doing?（省略号内容为描述某个时间,比如‘when the rain falls,what were you doing?’
如果单纯要表示在那时,用‘At that time,what were you doing?’即可