can fight
Verbo irregular: fight - fought- fought

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can fight
you can fight
she can fight
we can fight
you can fight
they can fight 	I can be fighting
you can be fighting
she can be fighting
we can be fighting
you can be fighting
they can be fighting	I can have fought
you can have fought
she can have fought
we can have fought
you can have fought
they can have fought	I can have been fighting
you can have been fighting
she can have been fighting
we can have been fighting
you can have been fighting
they can have been fighting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot fight
you cannot fight
she cannot fight
we cannot fight
you cannot fight
they cannot fight 	I cannot be fighting
you cannot be fighting
she cannot be fighting
we cannot be fighting
you cannot be fighting
they cannot be fighting	I cannot have fought
you cannot have fought
she cannot have fought
we cannot have fought
you cannot have fought
they cannot have fought	I cannot have been fighting
you cannot have been fighting
she cannot have been fighting
we cannot have been fighting
you cannot have been fighting
they cannot have been fighting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I fight?
can you fight?
can she fight?
can we fight?
can you fight?
can they fight? 	can I be fighting?
can you be fighting?
can she be fighting?
can we be fighting?
can you be fighting?
can they be fighting? 	can I have fought?
can you have fought?
can she have fought?
can we have fought?
can you have fought?
can they have fought? 	can I have been fighting?
can you have been fighting?
can she have been fighting?
can we have been fighting?
can you have been fighting?
can they have been fighting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not fight?
can you not fight?
can she not fight?
can we not fight?
can you not fight?
can they not fight? 	can I not be fighting?
can you not be fighting?
can she not be fighting?
can we not be fighting?
can you not be fighting?
can they not be fighting? 	can I not have fought?
can you not have fought?
can she not have fought?
can we not have fought?
can you not have fought?
can they not have fought? 	can I not have been fighting?
can you not have been fighting?
can she not have been fighting?
can we not have been fighting?
can you not have been fighting?
can they not have been fighting?