I may keen you may keen she may keen we may keen you may keen they may keen
V-ing form
I may be keening you may be keening she may be keening we may be keening you may be keening they may be keening
Perfect
I may have keened you may have keened she may have keened we may have keened you may have keened they may have keened
V-ing perfect
I may have been keening you may have been keening she may have been keening we may have been keening you may have been keening they may have been keening
Negation
Simple form
I may not keen you may not keen she may not keen we may not keen you may not keen they may not keen
V-ing form
I may not be keening you may not be keening she may not be keening we may not be keening you may not be keening they may not be keening
Perfect
I may not have keened you may not have keened she may not have keened we may not have keened you may not have keened they may not have keened
V-ing perfect
I may not have been keening you may not have been keening she may not have been keening we may not have been keening you may not have been keening they may not have been keening
Interrogative form
Simple form
may I keen? may you keen? may she keen? may we keen? may you keen? may they keen?
V-ing form
may I be keening? may you be keening? may she be keening? may we be keening? may you be keening? may they be keening?
Perfect
may I have keened? may you have keened? may she have keened? may we have keened? may you have keened? may they have keened?
V-ing perfect
may I have been keening? may you have been keening? may she have been keening? may we have been keening? may you have been keening? may they have been keening?
Interro-negative form
Simple form
may I not keen? may you not keen? may she not keen? may we not keen? may you not keen? may they not keen?
V-ing form
may I not be keening? may you not be keening? may she not be keening? may we not be keening? may you not be keening? may they not be keening?
Perfect
may I not have keened? may you not have keened? may she not have keened? may we not have keened? may you not have keened? may they not have keened?
V-ing perfect
may I not have been keening? may you not have been keening? may she not have been keening? may we not have been keening? may you not have been keening? may they not have been keening?