could raven
Verbo regular: raven - ravened- ravened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could raven
you could raven
he could raven
we could raven
you could raven
they could raven 	I could be ravening
you could be ravening
he could be ravening
we could be ravening
you could be ravening
they could be ravening	I could have ravened
you could have ravened
he could have ravened
we could have ravened
you could have ravened
they could have ravened	I could have been ravening
you could have been ravening
he could have been ravening
we could have been ravening
you could have been ravening
they could have been ravening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't raven
you couldn't raven
he couldn't raven
we couldn't raven
you couldn't raven
they couldn't raven 	I couldn't be ravening
you couldn't be ravening
he couldn't be ravening
we couldn't be ravening
you couldn't be ravening
they couldn't be ravening	I couldn't have ravened
you couldn't have ravened
he couldn't have ravened
we couldn't have ravened
you couldn't have ravened
they couldn't have ravened	I couldn't have been ravening
you couldn't have been ravening
he couldn't have been ravening
we couldn't have been ravening
you couldn't have been ravening
they couldn't have been ravening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I raven?
could you raven?
could he raven?
could we raven?
could you raven?
could they raven? 	could I be ravening?
could you be ravening?
could he be ravening?
could we be ravening?
could you be ravening?
could they be ravening? 	could I have ravened?
could you have ravened?
could he have ravened?
could we have ravened?
could you have ravened?
could they have ravened? 	could I have been ravening?
could you have been ravening?
could he have been ravening?
could we have been ravening?
could you have been ravening?
could they have been ravening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I raven?
couldn't you raven?
couldn't he raven?
couldn't we raven?
couldn't you raven?
couldn't they raven? 	couldn't I be ravening?
couldn't you be ravening?
couldn't he be ravening?
couldn't we be ravening?
couldn't you be ravening?
couldn't they be ravening? 	couldn't I have ravened?
couldn't you have ravened?
couldn't he have ravened?
couldn't we have ravened?
couldn't you have ravened?
couldn't they have ravened? 	couldn't I have been ravening?
couldn't you have been ravening?
couldn't he have been ravening?
couldn't we have been ravening?
couldn't you have been ravening?
couldn't they have been ravening?