could raven
Verbo regular: raven - ravened- ravened

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not raven
you could not raven
he could not raven
we could not raven
you could not raven
they could not raven 	I could not be ravening
you could not be ravening
he could not be ravening
we could not be ravening
you could not be ravening
they could not be ravening	I could not have ravened
you could not have ravened
he could not have ravened
we could not have ravened
you could not have ravened
they could not have ravened	I could not have been ravening
you could not have been ravening
he could not have been ravening
we could not have been ravening
you could not have been ravening
they could not have been ravening	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com 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-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not raven?
could you not raven?
could he not raven?
could we not raven?
could you not raven?
could they not raven? 	could I not be ravening?
could you not be ravening?
could he not be ravening?
could we not be ravening?
could you not be ravening?
could they not be ravening? 	could I not have ravened?
could you not have ravened?
could he not have ravened?
could we not have ravened?
could you not have ravened?
could they not have ravened? 	could I not have been ravening?
could you not have been ravening?
could he not have been ravening?
could we not have been ravening?
could you not have been ravening?
could they not have been ravening?