Why are you sorry for something you haven't done?
Of course I apologised, saying that the first appointment had priority.
I've apologised, so lay off, OK?
Even if you are not to blame, you should apologize.
I called Susan to apologize to her, but she hung up on me.
You ought to have apologized to her.
She apologized to his father for coming home late.
You should apologize to her.
You should apologize to her for having been rude to her.
You should apologize to her for being rude.
It is desirable that she should apologize to him herself.
Nothing but a full apology would satisfy him.
They had no other recourse but to apologize.
The three of them were the only ones to apologize to her.
I'm of the opinion that he should apologize to his teacher.
He might at least apologize.
He did not even have the grace to apologize.
He wouldn't lower himself to apologize.
He apologized to them for taking up their time.
He prostrated himself and begged my pardon.