French phrase
Je ~ partir plus tôt.
Meaning
I ___ leave earlier.
When to use it
It says that leaving earlier is not possible. It explains a scheduling constraint or declines a proposed change.
Example dialogue
Tu peux venir à 18h au lieu de 19h ?
Can you come at 6 pm instead of 7 pm?
Je ne peux pas partir plus tôt.
I can't leave earlier.