could raven raven
Regular verb: raven raven - raven ravened- raven ravened

, this verb may not exist. Conjugation is given as example.

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could raven raven
you could raven raven
she could raven raven
we could raven raven
you could raven raven
they could raven raven 	I could be raven ravening
you could be raven ravening
she could be raven ravening
we could be raven ravening
you could be raven ravening
they could be raven ravening	I could have raven ravened
you could have raven ravened
she could have raven ravened
we could have raven ravened
you could have raven ravened
they could have raven ravened	I could have been raven ravening
you could have been raven ravening
she could have been raven ravening
we could have been raven ravening
you could have been raven ravening
they could have been raven ravening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not raven raven
you could not raven raven
she could not raven raven
we could not raven raven
you could not raven raven
they could not raven raven 	I could not be raven ravening
you could not be raven ravening
she could not be raven ravening
we could not be raven ravening
you could not be raven ravening
they could not be raven ravening	I could not have raven ravened
you could not have raven ravened
she could not have raven ravened
we could not have raven ravened
you could not have raven ravened
they could not have raven ravened	I could not have been raven ravening
you could not have been raven ravening
she could not have been raven ravening
we could not have been raven ravening
you could not have been raven ravening
they could not have been raven ravening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I raven raven?
could you raven raven?
could she raven raven?
could we raven raven?
could you raven raven?
could they raven raven? 	could I be raven ravening?
could you be raven ravening?
could she be raven ravening?
could we be raven ravening?
could you be raven ravening?
could they be raven ravening? 	could I have raven ravened?
could you have raven ravened?
could she have raven ravened?
could we have raven ravened?
could you have raven ravened?
could they have raven ravened? 	could I have been raven ravening?
could you have been raven ravening?
could she have been raven ravening?
could we have been raven ravening?
could you have been raven ravening?
could they have been raven ravening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not raven raven?
could you not raven raven?
could she not raven raven?
could we not raven raven?
could you not raven raven?
could they not raven raven? 	could I not be raven ravening?
could you not be raven ravening?
could she not be raven ravening?
could we not be raven ravening?
could you not be raven ravening?
could they not be raven ravening? 	could I not have raven ravened?
could you not have raven ravened?
could she not have raven ravened?
could we not have raven ravened?
could you not have raven ravened?
could they not have raven ravened? 	could I not have been raven ravening?
could you not have been raven ravening?
could she not have been raven ravening?
could we not have been raven ravening?
could you not have been raven ravening?
could they not have been raven ravening?