regret的用法 regret doing sth和regret having diong sth 的区别?

regret的用法 regret doing sth和regret having diong sth 的区别?
比如说Tom从来不后悔将儿子送到国外留学,怎么翻译?
是Tom never regretted having sent his son to study abroad还是
Tom never regretted sendinghis son to study abroad?