English verb conjugation COULD UNDERGO

Irregular verb: undergo - underwent - undergone

Affirmation

Simple form

I could undergo
you could undergo
he could undergo
we could undergo
you could undergo
they could undergo

V-ing form

I could be undergoing
you could be undergoing
he could be undergoing
we could be undergoing
you could be undergoing
they could be undergoing

Perfect

I could have undergone
you could have undergone
he could have undergone
we could have undergone
you could have undergone
they could have undergone

V-ing perfect

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

Negation

Simple form

I could not undergo
you could not undergo
he could not undergo
we could not undergo
you could not undergo
they could not undergo

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I undergo?
could you undergo?
could he undergo?
could we undergo?
could you undergo?
could they undergo?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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