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