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 mayn't keen you mayn't keen she mayn't keen we mayn't keen you mayn't keen they mayn't keen
V-ing form
I mayn't be keening you mayn't be keening she mayn't be keening we mayn't be keening you mayn't be keening they mayn't be keening
Perfect
I mayn't have keened you mayn't have keened she mayn't have keened we mayn't have keened you mayn't have keened they mayn't have keened
V-ing perfect
I mayn't have been keening you mayn't have been keening she mayn't have been keening we mayn't have been keening you mayn't have been keening they mayn't 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
mayn't I keen? mayn't you keen? mayn't she keen? mayn't we keen? mayn't you keen? mayn't they keen?
V-ing form
mayn't I be keening? mayn't you be keening? mayn't she be keening? mayn't we be keening? mayn't you be keening? mayn't they be keening?
Perfect
mayn't I have keened? mayn't you have keened? mayn't she have keened? mayn't we have keened? mayn't you have keened? mayn't they have keened?
V-ing perfect
mayn't I have been keening? mayn't you have been keening? mayn't she have been keening? mayn't we have been keening? mayn't you have been keening? mayn't they have been keening?