I could valve you could valve she could valve we could valve you could valve they could valve
Forme en V-ing
I could be valving you could be valving she could be valving we could be valving you could be valving they could be valving
Perfect
I could have valved you could have valved she could have valved we could have valved you could have valved they could have valved
Perfect en V-ing
I could have been valving you could have been valving she could have been valving we could have been valving you could have been valving they could have been valving
Négation
Forme simple
I could not valve you could not valve she could not valve we could not valve you could not valve they could not valve
Forme en V-ing
I could not be valving you could not be valving she could not be valving we could not be valving you could not be valving they could not be valving
Perfect
I could not have valved you could not have valved she could not have valved we could not have valved you could not have valved they could not have valved
Perfect en V-ing
I could not have been valving you could not have been valving she could not have been valving we could not have been valving you could not have been valving they could not have been valving
Forme interrogative
Forme simple
could I valve? could you valve? could she valve? could we valve? could you valve? could they valve?
Forme en V-ing
could I be valving? could you be valving? could she be valving? could we be valving? could you be valving? could they be valving?
Perfect
could I have valved? could you have valved? could she have valved? could we have valved? could you have valved? could they have valved?
Perfect en V-ing
could I have been valving? could you have been valving? could she have been valving? could we have been valving? could you have been valving? could they have been valving?
Forme interro-négative
Forme simple
could I not valve? could you not valve? could she not valve? could we not valve? could you not valve? could they not valve?
Forme en V-ing
could I not be valving? could you not be valving? could she not be valving? could we not be valving? could you not be valving? could they not be valving?
Perfect
could I not have valved? could you not have valved? could she not have valved? could we not have valved? could you not have valved? could they not have valved?
Perfect en V-ing
could I not have been valving? could you not have been valving? could she not have been valving? could we not have been valving? could you not have been valving? could they not have been valving?