French phrase
Merci, mais je ne peux pas.
Meaning
Thank you, but I can't.
When to use it
A grateful but definite way to decline. It suits polite refusals of invitations or requests.
Example dialogue
Tu viens à ma fête ce soir ?
Are you coming to my party tonight?
Merci, mais je ne peux pas.
Thank you, but I can't.