could cluster
Verbe régulier : cluster - clustered- clustered
Traduction française : se grouper - former un groupe 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could cluster
you could cluster
she could cluster
we could cluster
you could cluster
they could cluster 	I could be clustering
you could be clustering
she could be clustering
we could be clustering
you could be clustering
they could be clustering	I could have clustered
you could have clustered
she could have clustered
we could have clustered
you could have clustered
they could have clustered	I could have been clustering
you could have been clustering
she could have been clustering
we could have been clustering
you could have been clustering
they could have been clustering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not cluster
you could not cluster
she could not cluster
we could not cluster
you could not cluster
they could not cluster 	I could not be clustering
you could not be clustering
she could not be clustering
we could not be clustering
you could not be clustering
they could not be clustering	I could not have clustered
you could not have clustered
she could not have clustered
we could not have clustered
you could not have clustered
they could not have clustered	I could not have been clustering
you could not have been clustering
she could not have been clustering
we could not have been clustering
you could not have been clustering
they could not have been clustering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I cluster?
could you cluster?
could she cluster?
could we cluster?
could you cluster?
could they cluster? 	could I be clustering?
could you be clustering?
could she be clustering?
could we be clustering?
could you be clustering?
could they be clustering? 	could I have clustered?
could you have clustered?
could she have clustered?
could we have clustered?
could you have clustered?
could they have clustered? 	could I have been clustering?
could you have been clustering?
could she have been clustering?
could we have been clustering?
could you have been clustering?
could they have been clustering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not cluster?
could you not cluster?
could she not cluster?
could we not cluster?
could you not cluster?
could they not cluster? 	could I not be clustering?
could you not be clustering?
could she not be clustering?
could we not be clustering?
could you not be clustering?
could they not be clustering? 	could I not have clustered?
could you not have clustered?
could she not have clustered?
could we not have clustered?
could you not have clustered?
could they not have clustered? 	could I not have been clustering?
could you not have been clustering?
could she not have been clustering?
could we not have been clustering?
could you not have been clustering?
could they not have been clustering?