I can fight you can fight she can fight we can fight you can fight they can fight
Forma con V-ing
I can be fighting you can be fighting she can be fighting we can be fighting you can be fighting they can be fighting
Perfecto
I can have fought you can have fought she can have fought we can have fought you can have fought they can have fought
Perfecto con V-ing
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
I can't fight you can't fight she can't fight we can't fight you can't fight they can't fight
Forma con V-ing
I can't be fighting you can't be fighting she can't be fighting we can't be fighting you can't be fighting they can't be fighting
Perfecto
I can't have fought you can't have fought she can't have fought we can't have fought you can't have fought they can't have fought
Perfecto con V-ing
I can't have been fighting you can't have been fighting she can't have been fighting we can't have been fighting you can't have been fighting they can't have been fighting
Forma interrogativa
Forma simple
can I fight? can you fight? can she fight? can we fight? can you fight? can they fight?
Forma con V-ing
can I be fighting? can you be fighting? can she be fighting? can we be fighting? can you be fighting? can they be fighting?
Perfecto
can I have fought? can you have fought? can she have fought? can we have fought? can you have fought? can they have fought?
Perfecto con V-ing
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
can't I fight? can't you fight? can't she fight? can't we fight? can't you fight? can't they fight?
Forma con V-ing
can't I be fighting? can't you be fighting? can't she be fighting? can't we be fighting? can't you be fighting? can't they be fighting?
Perfecto
can't I have fought? can't you have fought? can't she have fought? can't we have fought? can't you have fought? can't they have fought?
Perfecto con V-ing
can't I have been fighting? can't you have been fighting? can't she have been fighting? can't we have been fighting? can't you have been fighting? can't they have been fighting?