English verb conjugation COULD ZIPPER

Regular verb: zipper - zippered - zippered

Affirmation

Simple form

I could zipper
you could zipper
he could zipper
we could zipper
you could zipper
they could zipper

V-ing form

I could be zippering
you could be zippering
he could be zippering
we could be zippering
you could be zippering
they could be zippering

Perfect

I could have zippered
you could have zippered
he could have zippered
we could have zippered
you could have zippered
they could have zippered

V-ing perfect

I could have been zippering
you could have been zippering
he could have been zippering
we could have been zippering
you could have been zippering
they could have been zippering

Negation

Simple form

I could not zipper
you could not zipper
he could not zipper
we could not zipper
you could not zipper
they could not zipper

V-ing form

I could not be zippering
you could not be zippering
he could not be zippering
we could not be zippering
you could not be zippering
they could not be zippering

Perfect

I could not have zippered
you could not have zippered
he could not have zippered
we could not have zippered
you could not have zippered
they could not have zippered

V-ing perfect

I could not have been zippering
you could not have been zippering
he could not have been zippering
we could not have been zippering
you could not have been zippering
they could not have been zippering

Interrogative form

Simple form

could I zipper?
could you zipper?
could he zipper?
could we zipper?
could you zipper?
could they zipper?

V-ing form

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

Perfect

could I have zippered?
could you have zippered?
could he have zippered?
could we have zippered?
could you have zippered?
could they have zippered?

V-ing perfect

could I have been zippering?
could you have been zippering?
could he have been zippering?
could we have been zippering?
could you have been zippering?
could they have been zippering?

Interro-negative form

Simple form

could I not zipper?
could you not zipper?
could he not zipper?
could we not zipper?
could you not zipper?
could they not zipper?

V-ing form

could I not be zippering?
could you not be zippering?
could he not be zippering?
could we not be zippering?
could you not be zippering?
could they not be zippering?

Perfect

could I not have zippered?
could you not have zippered?
could he not have zippered?
could we not have zippered?
could you not have zippered?
could they not have zippered?

V-ing perfect

could I not have been zippering?
could you not have been zippering?
could he not have been zippering?
could we not have been zippering?
could you not have been zippering?
could they not have been zippering?

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