English verb conjugation
CAN VALVE

Regular verb: valve - valved - valved

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?