can rack
Verbo regular: rack - racked- racked

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can rack
you can rack
she can rack
we can rack
you can rack
they can rack 	I can be racking
you can be racking
she can be racking
we can be racking
you can be racking
they can be racking	I can have racked
you can have racked
she can have racked
we can have racked
you can have racked
they can have racked	I can have been racking
you can have been racking
she can have been racking
we can have been racking
you can have been racking
they can have been racking	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot rack
you cannot rack
she cannot rack
we cannot rack
you cannot rack
they cannot rack 	I cannot be racking
you cannot be racking
she cannot be racking
we cannot be racking
you cannot be racking
they cannot be racking	I cannot have racked
you cannot have racked
she cannot have racked
we cannot have racked
you cannot have racked
they cannot have racked	I cannot have been racking
you cannot have been racking
she cannot have been racking
we cannot have been racking
you cannot have been racking
they cannot have been racking	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I rack?
can you rack?
can she rack?
can we rack?
can you rack?
can they rack? 	can I be racking?
can you be racking?
can she be racking?
can we be racking?
can you be racking?
can they be racking? 	can I have racked?
can you have racked?
can she have racked?
can we have racked?
can you have racked?
can they have racked? 	can I have been racking?
can you have been racking?
can she have been racking?
can we have been racking?
can you have been racking?
can they have been racking? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not rack?
can you not rack?
can she not rack?
can we not rack?
can you not rack?
can they not rack? 	can I not be racking?
can you not be racking?
can she not be racking?
can we not be racking?
can you not be racking?
can they not be racking? 	can I not have racked?
can you not have racked?
can she not have racked?
can we not have racked?
can you not have racked?
can they not have racked? 	can I not have been racking?
can you not have been racking?
can she not have been racking?
can we not have been racking?
can you not have been racking?
can they not have been racking?