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