问题描述: is a walk after meal goodor bad have has having hasing 原因 1个回答 分类:英语 2014-11-02 问题解答: 我来补答 填 having .Is having a walk after meal good or bad have (has )是动词,不能作主语,所以用动词ing 形式 having 作主语.没有hasing 这个形式.句意是:饭后散步有益还是有害? 展开全文阅读