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 couldn't gnarl you couldn't gnarl he couldn't gnarl we couldn't gnarl you couldn't gnarl they couldn't gnarl	I couldn't be gnarling you couldn't be gnarling he couldn't be gnarling we couldn't be gnarling you couldn't be gnarling they couldn't be gnarling
Perfect	V-ing perfect
I couldn't have gnarled you couldn't have gnarled he couldn't have gnarled we couldn't have gnarled you couldn't have gnarled they couldn't have gnarled	I couldn't have been gnarling you couldn't have been gnarling he couldn't have been gnarling we couldn't have been gnarling you couldn't have been gnarling they couldn't 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
couldn't I gnarl? couldn't you gnarl? couldn't he gnarl? couldn't we gnarl? couldn't you gnarl? couldn't they gnarl?	couldn't I be gnarling? couldn't you be gnarling? couldn't he be gnarling? couldn't we be gnarling? couldn't you be gnarling? couldn't they be gnarling?
Perfect	V-ing perfect
couldn't I have gnarled? couldn't you have gnarled? couldn't he have gnarled? couldn't we have gnarled? couldn't you have gnarled? couldn't they have gnarled?	couldn't I have been gnarling? couldn't you have been gnarling? couldn't he have been gnarling? couldn't we have been gnarling? couldn't you have been gnarling? couldn't they have been gnarling?