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