English verb conjugation COULD UNDERTAIN

Regular verb: undertain - undertained - undertained

Affirmation

Simple form

I could undertain
you could undertain
he could undertain
we could undertain
you could undertain
they could undertain

V-ing form

I could be undertaining
you could be undertaining
he could be undertaining
we could be undertaining
you could be undertaining
they could be undertaining

Perfect

I could have undertained
you could have undertained
he could have undertained
we could have undertained
you could have undertained
they could have undertained

V-ing perfect

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

Negation

Simple form

I could not undertain
you could not undertain
he could not undertain
we could not undertain
you could not undertain
they could not undertain

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I undertain?
could you undertain?
could he undertain?
could we undertain?
could you undertain?
could they undertain?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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