could blister
Verbo regolare: blister - blistered- blistered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could blister
you could blister
she could blister
we could blister
you could blister
they could blister 	I could be blistering
you could be blistering
she could be blistering
we could be blistering
you could be blistering
they could be blistering	I could have blistered
you could have blistered
she could have blistered
we could have blistered
you could have blistered
they could have blistered	I could have been blistering
you could have been blistering
she could have been blistering
we could have been blistering
you could have been blistering
they could have been blistering	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not blister
you could not blister
she could not blister
we could not blister
you could not blister
they could not blister 	I could not be blistering
you could not be blistering
she could not be blistering
we could not be blistering
you could not be blistering
they could not be blistering	I could not have blistered
you could not have blistered
she could not have blistered
we could not have blistered
you could not have blistered
they could not have blistered	I could not have been blistering
you could not have been blistering
she could not have been blistering
we could not have been blistering
you could not have been blistering
they could not have been blistering	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I blister?
could you blister?
could she blister?
could we blister?
could you blister?
could they blister? 	could I be blistering?
could you be blistering?
could she be blistering?
could we be blistering?
could you be blistering?
could they be blistering? 	could I have blistered?
could you have blistered?
could she have blistered?
could we have blistered?
could you have blistered?
could they have blistered? 	could I have been blistering?
could you have been blistering?
could she have been blistering?
could we have been blistering?
could you have been blistering?
could they have been blistering? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not blister?
could you not blister?
could she not blister?
could we not blister?
could you not blister?
could they not blister? 	could I not be blistering?
could you not be blistering?
could she not be blistering?
could we not be blistering?
could you not be blistering?
could they not be blistering? 	could I not have blistered?
could you not have blistered?
could she not have blistered?
could we not have blistered?
could you not have blistered?
could they not have blistered? 	could I not have been blistering?
could you not have been blistering?
could she not have been blistering?
could we not have been blistering?
could you not have been blistering?
could they not have been blistering?