after doing 与after having done的区别?

after doing 与after having done的区别? after having done与after doing 区别 新概念英语2第20课中 having done与have doing的区别 having done 与doing 区别 having done 与doing doing的形式：doing,being done,having done,having been done有什么区别? regret doing与regret having done有什么区别呢? having done 、done、 being done、 having being done 的区别与详细用法 having done和doing在句首的区别? regret doing sth 和 regret having done的区别 having done和doing做分词的区别? having done 与done作后置定语时的区别