Cách sử dụng
'Regretful' is an adjective that describes the feeling of sadness or disappointment for something that has happened or something that you did. You may use the word in situations where you feel sorry for doing something wrong or for not doing something that you were supposed to do. For example, you can say, "I am regretful that I missed my friend's birthday party" or "He was regretful for his behavior towards his parents."