I hear with regret that a friend is ill.

听说一个朋友病了，我感到很遗憾。

youdao

I hear with regret that your father is ill.

听说你的父亲病了我感到遗憾。

youdao

Other times, we see or hear things that concern us deeply, but we deal with the issue in our own minds, and we later regret not discussing it with the other person.

而在另一些情况下，我们看到或是听闻与我们紧密相关的事情，却反而选择了自作主张，之后又后悔没与旁人讨论。

youdao