why did he not have breakfast?与why didn’t he have breakfast?有什么区别吗
问题描述:
why did he not have breakfast?与why didn’t he have breakfast?有什么区别吗
答
前面一个句子一般是不怎么说的 问句中 did 和not 需要合并在一起
答
语法上没有差别,但习惯上更应倾向于使用后者.