Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could born you could born she could born we could born you could born they could born
V-ing form
I could be borning you could be borning she could be borning we could be borning you could be borning they could be borning
Perfect
I could have borned you could have borned she could have borned we could have borned you could have borned they could have borned
V-ing perfect
I could have been borning you could have been borning she could have been borning we could have been borning you could have been borning they could have been borning
Negation
Simple form
I could not born you could not born she could not born we could not born you could not born they could not born
V-ing form
I could not be borning you could not be borning she could not be borning we could not be borning you could not be borning they could not be borning
Perfect
I could not have borned you could not have borned she could not have borned we could not have borned you could not have borned they could not have borned
V-ing perfect
I could not have been borning you could not have been borning she could not have been borning we could not have been borning you could not have been borning they could not have been borning
Interrogative form
Simple form
could I born? could you born? could she born? could we born? could you born? could they born?
V-ing form
could I be borning? could you be borning? could she be borning? could we be borning? could you be borning? could they be borning?
Perfect
could I have borned? could you have borned? could she have borned? could we have borned? could you have borned? could they have borned?
V-ing perfect
could I have been borning? could you have been borning? could she have been borning? could we have been borning? could you have been borning? could they have been borning?
Interro-negative form
Simple form
could I not born? could you not born? could she not born? could we not born? could you not born? could they not born?
V-ing form
could I not be borning? could you not be borning? could she not be borning? could we not be borning? could you not be borning? could they not be borning?
Perfect
could I not have borned? could you not have borned? could she not have borned? could we not have borned? could you not have borned? could they not have borned?
V-ing perfect
could I not have been borning? could you not have been borning? could she not have been borning? could we not have been borning? could you not have been borning? could they not have been borning?