could differ
Verbo regular: differ - differed- differed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could differ
you could differ
she could differ
we could differ
you could differ
they could differ 	I could be differing
you could be differing
she could be differing
we could be differing
you could be differing
they could be differing	I could have differed
you could have differed
she could have differed
we could have differed
you could have differed
they could have differed	I could have been differing
you could have been differing
she could have been differing
we could have been differing
you could have been differing
they could have been differing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't differ
you couldn't differ
she couldn't differ
we couldn't differ
you couldn't differ
they couldn't differ 	I couldn't be differing
you couldn't be differing
she couldn't be differing
we couldn't be differing
you couldn't be differing
they couldn't be differing	I couldn't have differed
you couldn't have differed
she couldn't have differed
we couldn't have differed
you couldn't have differed
they couldn't have differed	I couldn't have been differing
you couldn't have been differing
she couldn't have been differing
we couldn't have been differing
you couldn't have been differing
they couldn't have been differing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I differ?
could you differ?
could she differ?
could we differ?
could you differ?
could they differ? 	could I be differing?
could you be differing?
could she be differing?
could we be differing?
could you be differing?
could they be differing? 	could I have differed?
could you have differed?
could she have differed?
could we have differed?
could you have differed?
could they have differed? 	could I have been differing?
could you have been differing?
could she have been differing?
could we have been differing?
could you have been differing?
could they have been differing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I differ?
couldn't you differ?
couldn't she differ?
couldn't we differ?
couldn't you differ?
couldn't they differ? 	couldn't I be differing?
couldn't you be differing?
couldn't she be differing?
couldn't we be differing?
couldn't you be differing?
couldn't they be differing? 	couldn't I have differed?
couldn't you have differed?
couldn't she have differed?
couldn't we have differed?
couldn't you have differed?
couldn't they have differed? 	couldn't I have been differing?
couldn't you have been differing?
couldn't she have been differing?
couldn't we have been differing?
couldn't you have been differing?
couldn't they have been differing?