Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must duck out you must duck out he must duck out we must duck out you must duck out they must duck out
V-ing form
I must be duck outing you must be duck outing he must be duck outing we must be duck outing you must be duck outing they must be duck outing
Perfect
I must have duck outed you must have duck outed he must have duck outed we must have duck outed you must have duck outed they must have duck outed
V-ing perfect
I must have been duck outing you must have been duck outing he must have been duck outing we must have been duck outing you must have been duck outing they must have been duck outing
Negation
Simple form
I must not duck out you must not duck out he must not duck out we must not duck out you must not duck out they must not duck out
V-ing form
I must not be duck outing you must not be duck outing he must not be duck outing we must not be duck outing you must not be duck outing they must not be duck outing
Perfect
I must not have duck outed you must not have duck outed he must not have duck outed we must not have duck outed you must not have duck outed they must not have duck outed
V-ing perfect
I must not have been duck outing you must not have been duck outing he must not have been duck outing we must not have been duck outing you must not have been duck outing they must not have been duck outing
Interrogative form
Simple form
must I duck out? must you duck out? must he duck out? must we duck out? must you duck out? must they duck out?
V-ing form
must I be duck outing? must you be duck outing? must he be duck outing? must we be duck outing? must you be duck outing? must they be duck outing?
Perfect
must I have duck outed? must you have duck outed? must he have duck outed? must we have duck outed? must you have duck outed? must they have duck outed?
V-ing perfect
must I have been duck outing? must you have been duck outing? must he have been duck outing? must we have been duck outing? must you have been duck outing? must they have been duck outing?
Interro-negative form
Simple form
must I not duck out? must you not duck out? must he not duck out? must we not duck out? must you not duck out? must they not duck out?
V-ing form
must I not be duck outing? must you not be duck outing? must he not be duck outing? must we not be duck outing? must you not be duck outing? must they not be duck outing?
Perfect
must I not have duck outed? must you not have duck outed? must he not have duck outed? must we not have duck outed? must you not have duck outed? must they not have duck outed?
V-ing perfect
must I not have been duck outing? must you not have been duck outing? must he not have been duck outing? must we not have been duck outing? must you not have been duck outing? must they not have been duck outing?