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