regret something
explain something
blame somebody for something
forgive somebody for something
apologize for something
make an excuse
to feel sorry or disappointed about something that you wish could be different.
to make something clearer and easier to understand by giving more details about it.
to say/think that a particular person is responsible for something bad or wrong that happened.
to stop being angry with someone for something they have done.
to say that you are sorry for doing something.
to give a reason to explain why you did something wrong.