can fight
Verbo irregular: fight - fought- fought

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can fight
you can fight
he can fight
we can fight
you can fight
they can fight 	I can be fighting
you can be fighting
he can be fighting
we can be fighting
you can be fighting
they can be fighting	I can have fought
you can have fought
he 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
he can have been fighting
we can have been fighting
you can have been fighting
they can have been fighting	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot fight
you cannot fight
he cannot fight
we cannot fight
you cannot fight
they cannot fight 	I cannot be fighting
you cannot be fighting
he cannot be fighting
we cannot be fighting
you cannot be fighting
they cannot be fighting	I cannot have fought
you cannot have fought
he 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
he cannot have been fighting
we cannot have been fighting
you cannot have been fighting
they cannot have been fighting	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I fight?
can you fight?
can he fight?
can we fight?
can you fight?
can they fight? 	can I be fighting?
can you be fighting?
can he be fighting?
can we be fighting?
can you be fighting?
can they be fighting? 	can I have fought?
can you have fought?
can he 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 he have been fighting?
can we have been fighting?
can you have been fighting?
can they have been fighting? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not fight?
can you not fight?
can he 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 he 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 he 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 he not have been fighting?
can we not have been fighting?
can you not have been fighting?
can they not have been fighting?