could fight
Irregular verb: fight - fought- fought

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fight
you could fight
she could fight
we could fight
you could fight
they could fight 	I could be fighting
you could be fighting
she could be fighting
we could be fighting
you could be fighting
they could be fighting	I could have fought
you could have fought
she could have fought
we could have fought
you could have fought
they could have fought	I could have been fighting
you could have been fighting
she could have been fighting
we could have been fighting
you could have been fighting
they could have been fighting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't fight
you couldn't fight
she couldn't fight
we couldn't fight
you couldn't fight
they couldn't fight 	I couldn't be fighting
you couldn't be fighting
she couldn't be fighting
we couldn't be fighting
you couldn't be fighting
they couldn't be fighting	I couldn't have fought
you couldn't have fought
she couldn't have fought
we couldn't have fought
you couldn't have fought
they couldn't have fought	I couldn't have been fighting
you couldn't have been fighting
she couldn't have been fighting
we couldn't have been fighting
you couldn't have been fighting
they couldn't have been fighting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fight?
could you fight?
could she fight?
could we fight?
could you fight?
could they fight? 	could I be fighting?
could you be fighting?
could she be fighting?
could we be fighting?
could you be fighting?
could they be fighting? 	could I have fought?
could you have fought?
could she have fought?
could we have fought?
could you have fought?
could they have fought? 	could I have been fighting?
could you have been fighting?
could she have been fighting?
could we have been fighting?
could you have been fighting?
could they have been fighting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I fight?
couldn't you fight?
couldn't she fight?
couldn't we fight?
couldn't you fight?
couldn't they fight? 	couldn't I be fighting?
couldn't you be fighting?
couldn't she be fighting?
couldn't we be fighting?
couldn't you be fighting?
couldn't they be fighting? 	couldn't I have fought?
couldn't you have fought?
couldn't she have fought?
couldn't we have fought?
couldn't you have fought?
couldn't they have fought? 	couldn't I have been fighting?
couldn't you have been fighting?
couldn't she have been fighting?
couldn't we have been fighting?
couldn't you have been fighting?
couldn't they have been fighting?