English verb conjugation COULD KNOLL

Regular verb: knoll - knolled - knolled

Affirmation

Simple form

I could knoll
you could knoll
he could knoll
we could knoll
you could knoll
they could knoll

V-ing form

I could be knolling
you could be knolling
he could be knolling
we could be knolling
you could be knolling
they could be knolling

Perfect

I could have knolled
you could have knolled
he could have knolled
we could have knolled
you could have knolled
they could have knolled

V-ing perfect

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

Negation

Simple form

I could not knoll
you could not knoll
he could not knoll
we could not knoll
you could not knoll
they could not knoll

V-ing form

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

Perfect

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

V-ing perfect

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

Interrogative form

Simple form

could I knoll?
could you knoll?
could he knoll?
could we knoll?
could you knoll?
could they knoll?

V-ing form

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

Perfect

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

V-ing perfect

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

Interro-negative form

Simple form

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

V-ing form

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

Perfect

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

V-ing perfect

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

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