regret的用法有regret to have done吗,有的话,和regret having done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 regret doing和regret having done 有什么区别 regret doing与regret having done有什么区别呢? regret doing和regret having done有何区别 regret to have done 与regret doing 有什么区别.肯定有区别 regret to do sth ,regret doing sth ,regret having done sth有什 regret doing ,regret having done 和 regret to have done三者是否一样 regret doing sth 和 regret having done的区别 having done和to have done区别?我们老师说regret to have done,forget h regret 的用法regret doing sth 是不是等于 regret having done sth? 关于regret doing和regret having done区别和相同的问题 to my regret和much to my regret有什么区别?much的作用是什么?