couldn't have
Elle n'aurait pas pu l'aimer mais elle aurait pu l'épouser.
She couldn't have loved him, but she could have married him.
— Manon des sources (1986)
Tom n'aurait pas pu le faire sans l'aide de Mary.
Tom couldn't have done it without Mary's help.
We couldn't have done it without you.
— Harry Potter et la Chambre des secrets (2002)
Il n'aurait pas pu le dire plus clairement.
He couldn't have put it more clearly.
Il savait des trucs qu'il n'aurait pas pu savoir.
He knew things he couldn't possibly have known.
— Good Luck, Have Fun, Don't Die (2026)
Il partit tôt, autrement il n'aurait pas pu monter dans ce train.
He left early; otherwise, he wouldn't have been able to get on that train.