I'm very sorry. / I'm really sorry.
a very formal way of saying sorry
I'm sorry for... / I'm sorry that...
said to mean that you regret and are sorry for something that you've done
I didn't mean to...
used to mean that you had no intention of offending or hurting someone and are sorry for doing so
said to acknowledge wrongdoing
said to take responsibility for something bad that has happened
I take full responsibility.
a very formal way of apologizing and acknowledging that you are the cause of something bad that has happened
I owe you an apology.
said to admit that you have done something wrong and must apologize to the hurt party
Can you forgive me?
a polite way of asking for someone's forgiveness
I shouldn't have...
said to express regret about something that you have done
It won't happen again.
said as an apology and a promise that you will not make the same mistake again
I'd like to make it up to you. / What can I do to make it up to you?
said with the intention of turning a bad situation around in order to be forgiven
a direct way of accepting an apology
an indirect way of forgiving someone
I don't hold it against you.
means that you have forgiven someone and do not hold a grudge against them
Don't worry about it.
said to forgive someone and put them at ease or encourage them to not think about what they have done
(Let's) forget about it.
used to say that the other person should not worry about what happened because it is not important or relevant
another way to tell someone to forget about a situation because it is not important
It's not your fault.
used to take blame away from someone who is taking it
used to mean that everything is alright
a casual, somewhat indifferent, way of telling someone not to worry