PRESENT: is/am/are/am not/ isn't/ aren't

PRETERIT: was/were/wasn't/weren't

PASSE: has been/have been/hasn't been/haven't been

ACTION VITE DANS LE PASSE: will be/won't be

PERMITION: can be/can't be

INTERDICTION: must be/mustn't be

CONSEIL: should be/souldn't be