I could underlay you could underlay he could underlay we could underlay you could underlay they could underlay
Forme en V-ing
I could be underlaying you could be underlaying he could be underlaying we could be underlaying you could be underlaying they could be underlaying
Perfect
I could have underlaid you could have underlaid he could have underlaid we could have underlaid you could have underlaid they could have underlaid
Perfect en V-ing
I could have been underlaying you could have been underlaying he could have been underlaying we could have been underlaying you could have been underlaying they could have been underlaying
Négation
Forme simple
I could not underlay you could not underlay he could not underlay we could not underlay you could not underlay they could not underlay
Forme en V-ing
I could not be underlaying you could not be underlaying he could not be underlaying we could not be underlaying you could not be underlaying they could not be underlaying
Perfect
I could not have underlaid you could not have underlaid he could not have underlaid we could not have underlaid you could not have underlaid they could not have underlaid
Perfect en V-ing
I could not have been underlaying you could not have been underlaying he could not have been underlaying we could not have been underlaying you could not have been underlaying they could not have been underlaying
Forme interrogative
Forme simple
could I underlay? could you underlay? could he underlay? could we underlay? could you underlay? could they underlay?
Forme en V-ing
could I be underlaying? could you be underlaying? could he be underlaying? could we be underlaying? could you be underlaying? could they be underlaying?
Perfect
could I have underlaid? could you have underlaid? could he have underlaid? could we have underlaid? could you have underlaid? could they have underlaid?
Perfect en V-ing
could I have been underlaying? could you have been underlaying? could he have been underlaying? could we have been underlaying? could you have been underlaying? could they have been underlaying?
Forme interro-négative
Forme simple
could I not underlay? could you not underlay? could he not underlay? could we not underlay? could you not underlay? could they not underlay?
Forme en V-ing
could I not be underlaying? could you not be underlaying? could he not be underlaying? could we not be underlaying? could you not be underlaying? could they not be underlaying?
Perfect
could I not have underlaid? could you not have underlaid? could he not have underlaid? could we not have underlaid? could you not have underlaid? could they not have underlaid?
Perfect en V-ing
could I not have been underlaying? could you not have been underlaying? could he not have been underlaying? could we not have been underlaying? could you not have been underlaying? could they not have been underlaying?