could snarl
Regular verb: snarl - snarled- snarled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
I couldn't snarl
you couldn't snarl
he couldn't snarl
we couldn't snarl
you couldn't snarl
they couldn't snarl 	I couldn't be snarling
you couldn't be snarling
he couldn't be snarling
we couldn't be snarling
you couldn't be snarling
they couldn't be snarling	I couldn't have snarled
you couldn't have snarled
he couldn't have snarled
we couldn't have snarled
you couldn't have snarled
they couldn't have snarled	I couldn't have been snarling
you couldn't have been snarling
he couldn't have been snarling
we couldn't have been snarling
you couldn't have been snarling
they couldn't have been snarling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
couldn't I snarl?
couldn't you snarl?
couldn't he snarl?
couldn't we snarl?
couldn't you snarl?
couldn't they snarl? 	couldn't I be snarling?
couldn't you be snarling?
couldn't he be snarling?
couldn't we be snarling?
couldn't you be snarling?
couldn't they be snarling? 	couldn't I have snarled?
couldn't you have snarled?
couldn't he have snarled?
couldn't we have snarled?
couldn't you have snarled?
couldn't they have snarled? 	couldn't I have been snarling?
couldn't you have been snarling?
couldn't he have been snarling?
couldn't we have been snarling?
couldn't you have been snarling?
couldn't they have been snarling?