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