Mettez le phrases suivantes à la voix passive ou active selon le cas. Ne mentionnez pas l'agent (complément d'agent ) sans qu'il soit nécessaire.
Someone ought to have told him that the meeting was at 10 PM. He ought to have been told that the meeting was at 10 PM. — ought to (modal) + passé de l'infinitf passif
We will clean your swimming-pool this weekend. Your swimming-pool will be cleaned this weekend. — will (modal) + infinitif passif
This work was painted by Picasso. Picasso painted this work. — prétterit simple, voix active