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.

regret to do和regret doing有何区别 regret doing与regret todo用发有什么不同? regret doing与regret having done有什么区别呢? regret doing和regret having done有何区别 Regret to do和regret doing有何区别 regret doing sth 和 regret having done的区别 [紧急求助]regret doing sth.与regret to do sth. regret to do 和热regret doing 有什么不同? 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 not 后一定要接doing吗? 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. Regret to do sth 与Regret doing sth有什么区别? regret to have done 与regret doing 有什么区别.肯定有区别 regret not to do sth和regret doing是否可以替换 问个英语问题,regret to do 与regret doing的区别 regret用法 Regret never