Phrases Phrases for Expressing Regret

I'm to blame.

B1

Meaning

Accepting responsibility for something negative.

Example sentences

John: The project is behind schedule.

Alice: What happened?

John: I'm to blame. I didn't manage my time effectively.

Alice: It's okay, everyone makes mistakes. The important thing is that you own it and we work to solve the problem. So you admit I'm to blame for the delay?