regret to do和regret doing的区别为：意思不同、用法不同、侧重点不同。一、意思不同regret to do：对要做的事遗憾。regret doing：对做过的事表示遗憾、后悔。二···

regret的形容词1、regretful后悔的，遗憾的；惋惜的例句：We were deeply regretful to hear that you could not come and spen···