could valve
Verbe régulier : valve - valved- valved

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could valve
you could valve
he could valve
we could valve
you could valve
they could valve 	I could be valving
you could be valving
he could be valving
we could be valving
you could be valving
they could be valving	I could have valved
you could have valved
he could have valved
we could have valved
you could have valved
they could have valved	I could have been valving
you could have been valving
he could have been valving
we could have been valving
you could have been valving
they could have been valving	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't valve
you couldn't valve
he couldn't valve
we couldn't valve
you couldn't valve
they couldn't valve 	I couldn't be valving
you couldn't be valving
he couldn't be valving
we couldn't be valving
you couldn't be valving
they couldn't be valving	I couldn't have valved
you couldn't have valved
he couldn't have valved
we couldn't have valved
you couldn't have valved
they couldn't have valved	I couldn't have been valving
you couldn't have been valving
he couldn't have been valving
we couldn't have been valving
you couldn't have been valving
they couldn't have been valving	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I valve?
could you valve?
could he valve?
could we valve?
could you valve?
could they valve? 	could I be valving?
could you be valving?
could he be valving?
could we be valving?
could you be valving?
could they be valving? 	could I have valved?
could you have valved?
could he have valved?
could we have valved?
could you have valved?
could they have valved? 	could I have been valving?
could you have been valving?
could he have been valving?
could we have been valving?
could you have been valving?
could they have been valving? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I valve?
couldn't you valve?
couldn't he valve?
couldn't we valve?
couldn't you valve?
couldn't they valve? 	couldn't I be valving?
couldn't you be valving?
couldn't he be valving?
couldn't we be valving?
couldn't you be valving?
couldn't they be valving? 	couldn't I have valved?
couldn't you have valved?
couldn't he have valved?
couldn't we have valved?
couldn't you have valved?
couldn't they have valved? 	couldn't I have been valving?
couldn't you have been valving?
couldn't he have been valving?
couldn't we have been valving?
couldn't you have been valving?
couldn't they have been valving?