遗憾用英语怎么说

"Regret" is the English word for "遗憾". If you want to express a sense of loss or sorrow, you can say "I have regrets" or "I deeply regret". For example, "I deeply regret not studying abroad when I had the chance" or "I have regrets about not telling her how I felt". If you want to express a feeling of sadness or disappointment, you can say "I'm sorry, I feel regretful" or "I feel regretful for what happened". For example, "I'm sorry, I feel regretful for hurting your feelings" or "I feel regretful for not being there for you when you needed me".