I could billet you could billet he could billet we could billet you could billet they could billet
Forme en V-ing
I could be billeting you could be billeting he could be billeting we could be billeting you could be billeting they could be billeting
Perfect
I could have billeted you could have billeted he could have billeted we could have billeted you could have billeted they could have billeted
Perfect en V-ing
I could have been billeting you could have been billeting he could have been billeting we could have been billeting you could have been billeting they could have been billeting
Négation
Forme simple
I couldn't billet you couldn't billet he couldn't billet we couldn't billet you couldn't billet they couldn't billet
Forme en V-ing
I couldn't be billeting you couldn't be billeting he couldn't be billeting we couldn't be billeting you couldn't be billeting they couldn't be billeting
Perfect
I couldn't have billeted you couldn't have billeted he couldn't have billeted we couldn't have billeted you couldn't have billeted they couldn't have billeted
Perfect en V-ing
I couldn't have been billeting you couldn't have been billeting he couldn't have been billeting we couldn't have been billeting you couldn't have been billeting they couldn't have been billeting
Forme interrogative
Forme simple
could I billet? could you billet? could he billet? could we billet? could you billet? could they billet?
Forme en V-ing
could I be billeting? could you be billeting? could he be billeting? could we be billeting? could you be billeting? could they be billeting?
Perfect
could I have billeted? could you have billeted? could he have billeted? could we have billeted? could you have billeted? could they have billeted?
Perfect en V-ing
could I have been billeting? could you have been billeting? could he have been billeting? could we have been billeting? could you have been billeting? could they have been billeting?
Forme interro-négative
Forme simple
couldn't I billet? couldn't you billet? couldn't he billet? couldn't we billet? couldn't you billet? couldn't they billet?
Forme en V-ing
couldn't I be billeting? couldn't you be billeting? couldn't he be billeting? couldn't we be billeting? couldn't you be billeting? couldn't they be billeting?
Perfect
couldn't I have billeted? couldn't you have billeted? couldn't he have billeted? couldn't we have billeted? couldn't you have billeted? couldn't they have billeted?
Perfect en V-ing
couldn't I have been billeting? couldn't you have been billeting? couldn't he have been billeting? couldn't we have been billeting? couldn't you have been billeting? couldn't they have been billeting?