regret的形容词遗憾的

Surprisingly, she didn't feel nervous, or regretful about her actions.

令人惊讶的是，她并没有对她的行为感到紧张或后悔。

Mr Griffin gave a regretful smile

格里芬先生遗憾地笑了笑。

A person who does a regrettable action is often regretful afterwards.

行为不检点的'人，日后往往懊悔。

One can imagine how regretful he was.

可以想像他是多么懊悔。

Reminding of what he had said to sun xiu, he regretful and signed to the sky.

他仰天长叹了一口气，很有点后悔的意思。