English verb conjugation COULD VALVE

Regular verb: valve - valved - valved

Affirmation

Simple form

I could valve
you could valve
he could valve
we could valve
you could valve
they could valve

V-ing form

I could be valving
you could be valving
he could be valving
we could be valving
you could be valving
they could be valving

Perfect

I could have valved
you could have valved
he 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
he 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
he 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
he 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
he 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
he 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 he valve?
could we valve?
could you valve?
could they valve?

V-ing form

could I be valving?
could you be valving?
could he be valving?
could we be valving?
could you be valving?
could they be valving?

Perfect

could I have valved?
could you have valved?
could he 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 he 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 he 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 he 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 he 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 he 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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