French phrase
Je suis dans l'incapacité d'achever ~ à temps.
Meaning
I am unable to complete ___ on time.
When to use it
States that a task cannot be completed by its deadline. A somewhat formal way to explain a delay and apologize.
Example dialogue
Je suis dans l'incapacité d'achever mon mémoire à temps.
I am unable to complete my thesis on time.
Je comprends, quelle nouvelle date proposez-vous ?
I understand. What new deadline do you propose?