问题描述: In the past ,all of the buses were double-decker ones.(改成否定句) 1个回答 分类:英语 2014-10-07 问题解答: 我来补答 In the past ,all of the buses were not double-decker ones在系动词后加not, 因为有all , 为部分否定 全部否定为: In the past ,none of the buses were double-decker ones 如不明白请追问,如果满意请采纳手机提问者如果满意,请在客户端右上角评价点“满意”即可, 谢谢!祝学习进步 展开全文阅读