Once my mother was ill and had stayde in the bed for several day.有什么错
问题描述：
Once my mother was ill and had stayde in the bed for several day.有什么错
答
had stayed改为had to stay
分析:此句为一般过去式的简单句,但在这个句子里却出现了不合语法的"had stayed"（过去完成时）
正：Once my mother was ill and had to stay in the bed for several day.