could coo
Verbo regular: coo - cooed- cooed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could coo
you could coo
he could coo
we could coo
you could coo
they could coo 	I could be cooing
you could be cooing
he could be cooing
we could be cooing
you could be cooing
they could be cooing	I could have cooed
you could have cooed
he could have cooed
we could have cooed
you could have cooed
they could have cooed	I could have been cooing
you could have been cooing
he could have been cooing
we could have been cooing
you could have been cooing
they could have been cooing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't coo
you couldn't coo
he couldn't coo
we couldn't coo
you couldn't coo
they couldn't coo 	I couldn't be cooing
you couldn't be cooing
he couldn't be cooing
we couldn't be cooing
you couldn't be cooing
they couldn't be cooing	I couldn't have cooed
you couldn't have cooed
he couldn't have cooed
we couldn't have cooed
you couldn't have cooed
they couldn't have cooed	I couldn't have been cooing
you couldn't have been cooing
he couldn't have been cooing
we couldn't have been cooing
you couldn't have been cooing
they couldn't have been cooing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I coo?
could you coo?
could he coo?
could we coo?
could you coo?
could they coo? 	could I be cooing?
could you be cooing?
could he be cooing?
could we be cooing?
could you be cooing?
could they be cooing? 	could I have cooed?
could you have cooed?
could he have cooed?
could we have cooed?
could you have cooed?
could they have cooed? 	could I have been cooing?
could you have been cooing?
could he have been cooing?
could we have been cooing?
could you have been cooing?
could they have been cooing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I coo?
couldn't you coo?
couldn't he coo?
couldn't we coo?
couldn't you coo?
couldn't they coo? 	couldn't I be cooing?
couldn't you be cooing?
couldn't he be cooing?
couldn't we be cooing?
couldn't you be cooing?
couldn't they be cooing? 	couldn't I have cooed?
couldn't you have cooed?
couldn't he have cooed?
couldn't we have cooed?
couldn't you have cooed?
couldn't they have cooed? 	couldn't I have been cooing?
couldn't you have been cooing?
couldn't he have been cooing?
couldn't we have been cooing?
couldn't you have been cooing?
couldn't they have been cooing?