English verb conjugation
COULD KNOLL

Regular verb: knoll - knolled - knolled

Affirmation

Simple form	V-ing form
I could knoll you could knoll he could knoll we could knoll you could knoll they could knoll	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
could I knoll? could you knoll? could he knoll? could we knoll? could you knoll? could they knoll?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?