MAKING AND ACCEPTING APOLOGIES: COMMON EXPRESSIONS

Making apologies:

I do apologize for...

I must apologize for...

I apologize for...

I'd like to apologize for...

I am so sorry for...

I shouldn't have...

It's all my fault.

I'm ashamed of...

Please, forgive me for...

Excuse me for...

I'm terribly sorry for...

Pardon me for this...

Please, forgive me for my...

Please, accept my apologies for...

Accepting apologies:

Forget about it.

Don't worry about it.

That's all right.

Never mind.

Don't apologize.

It doesn't matter.

Don't mention it.

That's OK.

I quite understand.

You couldn't help it.
No harm done.