English verb conjugation COULD QUARTERBACK

Regular verb: quarterback - quarterbacked - quarterbacked

Affirmation

Simple form

I could quarterback
you could quarterback
he could quarterback
we could quarterback
you could quarterback
they could quarterback

V-ing form

I could be quarterbacking
you could be quarterbacking
he could be quarterbacking
we could be quarterbacking
you could be quarterbacking
they could be quarterbacking

Perfect

I could have quarterbacked
you could have quarterbacked
he could have quarterbacked
we could have quarterbacked
you could have quarterbacked
they could have quarterbacked

V-ing perfect

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

Negation

Simple form

I could not quarterback
you could not quarterback
he could not quarterback
we could not quarterback
you could not quarterback
they could not quarterback

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I quarterback?
could you quarterback?
could he quarterback?
could we quarterback?
could you quarterback?
could they quarterback?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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