can valve
Verbo regular: valve - valved- valved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can valve
you can valve
she can valve
we can valve
you can valve
they can valve 	I can be valving
you can be valving
she can be valving
we can be valving
you can be valving
they can be valving	I can have valved
you can have valved
she can have valved
we can have valved
you can have valved
they can have valved	I can have been valving
you can have been valving
she can have been valving
we can have been valving
you can have been valving
they can have been valving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot valve
you cannot valve
she cannot valve
we cannot valve
you cannot valve
they cannot valve 	I cannot be valving
you cannot be valving
she cannot be valving
we cannot be valving
you cannot be valving
they cannot be valving	I cannot have valved
you cannot have valved
she cannot have valved
we cannot have valved
you cannot have valved
they cannot have valved	I cannot have been valving
you cannot have been valving
she cannot have been valving
we cannot have been valving
you cannot have been valving
they cannot have been valving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I valve?
can you valve?
can she valve?
can we valve?
can you valve?
can they valve? 	can I be valving?
can you be valving?
can she be valving?
can we be valving?
can you be valving?
can they be valving? 	can I have valved?
can you have valved?
can she have valved?
can we have valved?
can you have valved?
can they have valved? 	can I have been valving?
can you have been valving?
can she have been valving?
can we have been valving?
can you have been valving?
can they have been valving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not valve?
can you not valve?
can she not valve?
can we not valve?
can you not valve?
can they not valve? 	can I not be valving?
can you not be valving?
can she not be valving?
can we not be valving?
can you not be valving?
can they not be valving? 	can I not have valved?
can you not have valved?
can she not have valved?
can we not have valved?
can you not have valved?
can they not have valved? 	can I not have been valving?
can you not have been valving?
can she not have been valving?
can we not have been valving?
can you not have been valving?
can they not have been valving?