Phrases Phrases for Expressing Regret

I'm so sorry about...

B2

Meaning

Expressing sincere apology.

Example sentences

John: I broke your favorite vase.

Alice: Oh no!

John: I'm so sorry about that. I'll replace it.

Alice: It's okay, accidents happen. But thank you for apologizing. I also would say I'm so sorry about something, but it is too late to fix that situation.