English verb conjugation COULD VALVE

Regular verb: valve - valved - valved

Affirmation

Simple form

I could valve
you could valve
she could valve
we could valve
you could valve
they could valve

V-ing form

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

V-ing perfect

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

Negation

Simple form

I could not valve
you could not valve
she could not valve
we could not valve
you could not valve
they could not valve

V-ing form

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

V-ing perfect

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

Interrogative form

Simple form

could I valve?
could you valve?
could she valve?
could we valve?
could you valve?
could they valve?

V-ing form

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?

V-ing perfect

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?

Interro-negative form

Simple form

could I not valve?
could you not valve?
could she not valve?
could we not valve?
could you not valve?
could they not valve?

V-ing form

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?

V-ing perfect

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?

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