can ball
Verbo regular: ball - balled- balled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can ball
you can ball
he can ball
we can ball
you can ball
they can ball 	I can be balling
you can be balling
he can be balling
we can be balling
you can be balling
they can be balling	I can have balled
you can have balled
he can have balled
we can have balled
you can have balled
they can have balled	I can have been balling
you can have been balling
he can have been balling
we can have been balling
you can have been balling
they can have been balling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot ball
you cannot ball
he cannot ball
we cannot ball
you cannot ball
they cannot ball 	I cannot be balling
you cannot be balling
he cannot be balling
we cannot be balling
you cannot be balling
they cannot be balling	I cannot have balled
you cannot have balled
he cannot have balled
we cannot have balled
you cannot have balled
they cannot have balled	I cannot have been balling
you cannot have been balling
he cannot have been balling
we cannot have been balling
you cannot have been balling
they cannot have been balling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I ball?
can you ball?
can he ball?
can we ball?
can you ball?
can they ball? 	can I be balling?
can you be balling?
can he be balling?
can we be balling?
can you be balling?
can they be balling? 	can I have balled?
can you have balled?
can he have balled?
can we have balled?
can you have balled?
can they have balled? 	can I have been balling?
can you have been balling?
can he have been balling?
can we have been balling?
can you have been balling?
can they have been balling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not ball?
can you not ball?
can he not ball?
can we not ball?
can you not ball?
can they not ball? 	can I not be balling?
can you not be balling?
can he not be balling?
can we not be balling?
can you not be balling?
can they not be balling? 	can I not have balled?
can you not have balled?
can he not have balled?
can we not have balled?
can you not have balled?
can they not have balled? 	can I not have been balling?
can you not have been balling?
can he not have been balling?
can we not have been balling?
can you not have been balling?
can they not have been balling?