We had four classes yesterday morning.这个句子怎么变否定?
问题描述：
We had four classes yesterday morning.这个句子怎么变否定?
是变成We didn't have four classes yesterday morning.还是We hadn't four classes yesterday morning.
答
We didn't have four classes yesterday morning.
一般过去式的否定结构：主语+ didn't + 动词原形那么hadn't 是用来否定什么的呢？hadn't 一般用在过去完成时的否定句中