问题描述: not having done 和 having not done 的区别 1个回答 分类:英语 2014-10-28 问题解答: 我来补答 not having done是非谓语动词中正确的用法,用作状语比较多,如Not having heard from him,she decided to write another letterhave not done 是谓语动词完成时的否定形式,一般没有having not done 的 展开全文阅读