sorry for:为...感到可惜.
eg.I am sorry for your failing in the exam.我为你考试不及格感到可惜.
sorry about sth.为什么事感到抱歉.
eg.I am sorry about my mistake.我对我的错误感到抱歉.
sorry for:为...感到可惜.
eg.I am sorry for your failing in the exam.我为你考试不及格感到可惜.
sorry about sth.为什么事感到抱歉.
eg.I am sorry about my mistake.我对我的错误感到抱歉.