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