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 couldn't quarterback
you couldn't quarterback
he couldn't quarterback
we couldn't quarterback
you couldn't quarterback
they couldn't quarterback

V-ing form

I couldn't be quarterbacking
you couldn't be quarterbacking
he couldn't be quarterbacking
we couldn't be quarterbacking
you couldn't be quarterbacking
they couldn't be quarterbacking

Perfect

I couldn't have quarterbacked
you couldn't have quarterbacked
he couldn't have quarterbacked
we couldn't have quarterbacked
you couldn't have quarterbacked
they couldn't have quarterbacked

V-ing perfect

I couldn't have been quarterbacking
you couldn't have been quarterbacking
he couldn't have been quarterbacking
we couldn't have been quarterbacking
you couldn't have been quarterbacking
they couldn't 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

couldn't I quarterback?
couldn't you quarterback?
couldn't he quarterback?
couldn't we quarterback?
couldn't you quarterback?
couldn't they quarterback?

V-ing form

couldn't I be quarterbacking?
couldn't you be quarterbacking?
couldn't he be quarterbacking?
couldn't we be quarterbacking?
couldn't you be quarterbacking?
couldn't they be quarterbacking?

Perfect

couldn't I have quarterbacked?
couldn't you have quarterbacked?
couldn't he have quarterbacked?
couldn't we have quarterbacked?
couldn't you have quarterbacked?
couldn't they have quarterbacked?

V-ing perfect

couldn't I have been quarterbacking?
couldn't you have been quarterbacking?
couldn't he have been quarterbacking?
couldn't we have been quarterbacking?
couldn't you have been quarterbacking?
couldn't they have been quarterbacking?

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