English verb conjugation
COULD SNARL

Regular verb: snarl - snarled - snarled

Affirmation

Simple form	V-ing form
I could snarl you could snarl he could snarl we could snarl you could snarl they could snarl	I could be snarling you could be snarling he could be snarling we could be snarling you could be snarling they could be snarling
Perfect	V-ing perfect
I could have snarled you could have snarled he could have snarled we could have snarled you could have snarled they could have snarled	I could have been snarling you could have been snarling he could have been snarling we could have been snarling you could have been snarling they could have been snarling

Negation

Simple form	V-ing form
I could not snarl you could not snarl he could not snarl we could not snarl you could not snarl they could not snarl	I could not be snarling you could not be snarling he could not be snarling we could not be snarling you could not be snarling they could not be snarling
Perfect	V-ing perfect
I could not have snarled you could not have snarled he could not have snarled we could not have snarled you could not have snarled they could not have snarled	I could not have been snarling you could not have been snarling he could not have been snarling we could not have been snarling you could not have been snarling they could not have been snarling

Interrogative form

Simple form	V-ing form
could I snarl? could you snarl? could he snarl? could we snarl? could you snarl? could they snarl?	could I be snarling? could you be snarling? could he be snarling? could we be snarling? could you be snarling? could they be snarling?
Perfect	V-ing perfect
could I have snarled? could you have snarled? could he have snarled? could we have snarled? could you have snarled? could they have snarled?	could I have been snarling? could you have been snarling? could he have been snarling? could we have been snarling? could you have been snarling? could they have been snarling?

Interro-negative form

Simple form	V-ing form
could I not snarl? could you not snarl? could he not snarl? could we not snarl? could you not snarl? could they not snarl?	could I not be snarling? could you not be snarling? could he not be snarling? could we not be snarling? could you not be snarling? could they not be snarling?
Perfect	V-ing perfect
could I not have snarled? could you not have snarled? could he not have snarled? could we not have snarled? could you not have snarled? could they not have snarled?	could I not have been snarling? could you not have been snarling? could he not have been snarling? could we not have been snarling? could you not have been snarling? could they not have been snarling?