I'm afraid I can't...

Meaning

I regret to say I'm unable to...

Examples

• John: Could you help me move this weekend?
• Alice: <b>I'm afraid I can't</b>; I have a prior commitment.
• John: Oh, that's alright. I understand.
• Alice: I'm so sorry. <b>I'm afraid I can't</b> make it this weekend, but maybe next time.