she was at home at that time改为一否定句 jackwasdoinghishomeworkatthattime改为否定句(速度(... jack was doing his homework at that time 改为否定句(速度( 展开 我来答 1个回答 #热议# 为什么说不要把裤子提到肚脐眼? 柏圣沈博耘 2019-03-16 · TA获得超过1175个赞 知道小有建树答主 回答量:1764 采纳率:100% 帮助的人:10.4万 我也去答题访问个人页 关注 展开全部 jack was not doing his homework at that time 已赞过 已踩过< 你对这个回答的评价是? 评论 收起 推荐律师服务: 若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询 为你推荐: