English verb conjugation
CAN VALVE

Regular verb: valve - valved - valved

Affirmation

Simple form	V-ing form
I can valve you can valve he can valve we can valve you can valve they can valve	I can be valving you can be valving he 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 he 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 he 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 can't valve you can't valve he can't valve we can't valve you can't valve they can't valve	I can't be valving you can't be valving he can't be valving we can't be valving you can't be valving they can't be valving
Perfect	V-ing perfect
I can't have valved you can't have valved he can't have valved we can't have valved you can't have valved they can't have valved	I can't have been valving you can't have been valving he can't have been valving we can't have been valving you can't have been valving they can't have been valving

Interrogative form

Simple form	V-ing form
can I valve? can you valve? can he valve? can we valve? can you valve? can they valve?	can I be valving? can you be valving? can he 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 he 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 he 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't I valve? can't you valve? can't he valve? can't we valve? can't you valve? can't they valve?	can't I be valving? can't you be valving? can't he be valving? can't we be valving? can't you be valving? can't they be valving?
Perfect	V-ing perfect
can't I have valved? can't you have valved? can't he have valved? can't we have valved? can't you have valved? can't they have valved?	can't I have been valving? can't you have been valving? can't he have been valving? can't we have been valving? can't you have been valving? can't they have been valving?