regret having done哪位大侠帮我分析下这短语结构

regret having done哪位大侠帮我分析下这短语结构 regret doing与regret having done有什么区别呢? regret doing和regret having done有何区别 regret doing sth 和 regret having done的区别 regret 的用法regret doing sth 是不是等于 regret having done sth? regret to do sth ,regret doing sth ,regret having done sth有什么区别? regret的用法有regret to have done吗,有的话,和regret having done有什么区别 having done和to have done区别?我们老师说regret to have done,forget having done都表示完成. now i regret having done改成to have done不行吗?为什么? regret doing ,regret having done 和 regret to have done三者是否一样,都是表示对过去的推测.请有把握才回答. 关于regret的词性和用法regret可以做动词和名词一般说regret to do/regret doing我想问的是 be regret for doing sth.例如：I'm not regret for having done it. ——How dare you talk to your teacher like that?——Well,now i regret ever （having done） that.为什么要用having done TOM is not having been trained as a dancer is her own regret.这里为什么要用having been done呢,直接用done 可以吗? regret doing和regret having done 有什么区别朗文字典上有个例句,I regretted not having worn a thicker clothes .能不能写成 i regretted not wearing a thicker clothes not having done 还是having not done? never having done还是having never done I regret having done such a stupid thing.我后悔曾做了这件蠢事.为么用having done ,doing不行吗,也是后悔做某事啊 英语中能加doing的动词如allow或regret等等,它们都能将doing的形式变成having done构成v.+having done的形式吗?如果不能,请给几个常用的典例,