to one's regret

1. 很抱歉

Much to my regret, I must leave you now.

很抱歉, 我现在得走了。

with regret

1. 遗憾地

We announce with regret the death of the mayor.

我们遗憾地宣布市长去世了。


习惯用语express regret at [for, over]1.对...表示可惜[遗憾], 为...表示抱歉hear with regret of [that]1.听到觉得后悔[惋惜, 失望]refuse with many regrets [much regret]1.婉言谢绝send regrets [a regret]1.(尤指对请贴)发出辞谢信