His books are in the bookcase.变为一般疑问句是不是Are his books in the bookcase?为什么我这样写老师给我打叉?
问题描述：
His books are in the bookcase.变为一般疑问句是不是Are his books in the bookcase?为什么我这样写老师给我打叉?
答
你的句子是完全正确的,老师打错估计是改得太快,一时看错了