English verb conjugation
COULD GNARL

Regular verb: gnarl - gnarled - gnarled

Affirmation

Simple form	V-ing form
I could gnarl you could gnarl he could gnarl we could gnarl you could gnarl they could gnarl	I could be gnarling you could be gnarling he could be gnarling we could be gnarling you could be gnarling they could be gnarling
Perfect	V-ing perfect
I could have gnarled you could have gnarled he could have gnarled we could have gnarled you could have gnarled they could have gnarled	I could have been gnarling you could have been gnarling he could have been gnarling we could have been gnarling you could have been gnarling they could have been gnarling

Negation

Simple form	V-ing form
I could not gnarl you could not gnarl he could not gnarl we could not gnarl you could not gnarl they could not gnarl	I could not be gnarling you could not be gnarling he could not be gnarling we could not be gnarling you could not be gnarling they could not be gnarling
Perfect	V-ing perfect
I could not have gnarled you could not have gnarled he could not have gnarled we could not have gnarled you could not have gnarled they could not have gnarled	I could not have been gnarling you could not have been gnarling he could not have been gnarling we could not have been gnarling you could not have been gnarling they could not have been gnarling

Interrogative form

Simple form	V-ing form
could I gnarl? could you gnarl? could he gnarl? could we gnarl? could you gnarl? could they gnarl?	could I be gnarling? could you be gnarling? could he be gnarling? could we be gnarling? could you be gnarling? could they be gnarling?
Perfect	V-ing perfect
could I have gnarled? could you have gnarled? could he have gnarled? could we have gnarled? could you have gnarled? could they have gnarled?	could I have been gnarling? could you have been gnarling? could he have been gnarling? could we have been gnarling? could you have been gnarling? could they have been gnarling?

Interro-negative form

Simple form	V-ing form
could I not gnarl? could you not gnarl? could he not gnarl? could we not gnarl? could you not gnarl? could they not gnarl?	could I not be gnarling? could you not be gnarling? could he not be gnarling? could we not be gnarling? could you not be gnarling? could they not be gnarling?
Perfect	V-ing perfect
could I not have gnarled? could you not have gnarled? could he not have gnarled? could we not have gnarled? could you not have gnarled? could they not have gnarled?	could I not have been gnarling? could you not have been gnarling? could he not have been gnarling? could we not have been gnarling? could you not have been gnarling? could they not have been gnarling?