can cluster
Verbo regular: cluster - clustered- clustered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can cluster
you can cluster
she can cluster
we can cluster
you can cluster
they can cluster 	I can be clustering
you can be clustering
she can be clustering
we can be clustering
you can be clustering
they can be clustering	I can have clustered
you can have clustered
she can have clustered
we can have clustered
you can have clustered
they can have clustered	I can have been clustering
you can have been clustering
she can have been clustering
we can have been clustering
you can have been clustering
they can have been clustering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot cluster
you cannot cluster
she cannot cluster
we cannot cluster
you cannot cluster
they cannot cluster 	I cannot be clustering
you cannot be clustering
she cannot be clustering
we cannot be clustering
you cannot be clustering
they cannot be clustering	I cannot have clustered
you cannot have clustered
she cannot have clustered
we cannot have clustered
you cannot have clustered
they cannot have clustered	I cannot have been clustering
you cannot have been clustering
she cannot have been clustering
we cannot have been clustering
you cannot have been clustering
they cannot have been clustering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I cluster?
can you cluster?
can she cluster?
can we cluster?
can you cluster?
can they cluster? 	can I be clustering?
can you be clustering?
can she be clustering?
can we be clustering?
can you be clustering?
can they be clustering? 	can I have clustered?
can you have clustered?
can she have clustered?
can we have clustered?
can you have clustered?
can they have clustered? 	can I have been clustering?
can you have been clustering?
can she have been clustering?
can we have been clustering?
can you have been clustering?
can they have been clustering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not cluster?
can you not cluster?
can she not cluster?
can we not cluster?
can you not cluster?
can they not cluster? 	can I not be clustering?
can you not be clustering?
can she not be clustering?
can we not be clustering?
can you not be clustering?
can they not be clustering? 	can I not have clustered?
can you not have clustered?
can she not have clustered?
can we not have clustered?
can you not have clustered?
can they not have clustered? 	can I not have been clustering?
can you not have been clustering?
can she not have been clustering?
can we not have been clustering?
can you not have been clustering?
can they not have been clustering?