could checker
Verbo regolare: checker - checkered- checkered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could checker
you could checker
she could checker
we could checker
you could checker
they could checker 	I could be checkering
you could be checkering
she could be checkering
we could be checkering
you could be checkering
they could be checkering	I could have checkered
you could have checkered
she could have checkered
we could have checkered
you could have checkered
they could have checkered	I could have been checkering
you could have been checkering
she could have been checkering
we could have been checkering
you could have been checkering
they could have been checkering	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not checker
you could not checker
she could not checker
we could not checker
you could not checker
they could not checker 	I could not be checkering
you could not be checkering
she could not be checkering
we could not be checkering
you could not be checkering
they could not be checkering	I could not have checkered
you could not have checkered
she could not have checkered
we could not have checkered
you could not have checkered
they could not have checkered	I could not have been checkering
you could not have been checkering
she could not have been checkering
we could not have been checkering
you could not have been checkering
they could not have been checkering	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I checker?
could you checker?
could she checker?
could we checker?
could you checker?
could they checker? 	could I be checkering?
could you be checkering?
could she be checkering?
could we be checkering?
could you be checkering?
could they be checkering? 	could I have checkered?
could you have checkered?
could she have checkered?
could we have checkered?
could you have checkered?
could they have checkered? 	could I have been checkering?
could you have been checkering?
could she have been checkering?
could we have been checkering?
could you have been checkering?
could they have been checkering? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not checker?
could you not checker?
could she not checker?
could we not checker?
could you not checker?
could they not checker? 	could I not be checkering?
could you not be checkering?
could she not be checkering?
could we not be checkering?
could you not be checkering?
could they not be checkering? 	could I not have checkered?
could you not have checkered?
could she not have checkered?
could we not have checkered?
could you not have checkered?
could they not have checkered? 	could I not have been checkering?
could you not have been checkering?
could she not have been checkering?
could we not have been checkering?
could you not have been checkering?
could they not have been checkering?