French phrase
Ce serait difficile de ~.
Meaning
It would be difficult to ___.
When to use it
A polite way to say that something may be hard to do. It often softens a refusal by citing constraints.
Example dialogue
Pouvez-vous finir le rapport pour vendredi ?
Could you finish the report by Friday?
Ce serait difficile de finir le rapport.
It would be difficult to finish the report.