I may keep you may keep she may keep we may keep you may keep they may keep
V-ing form
I may be keeping you may be keeping she may be keeping we may be keeping you may be keeping they may be keeping
Perfect
I may have kept you may have kept she may have kept we may have kept you may have kept they may have kept
V-ing perfect
I may have been keeping you may have been keeping she may have been keeping we may have been keeping you may have been keeping they may have been keeping
Negation
Simple form
I mayn't keep you mayn't keep she mayn't keep we mayn't keep you mayn't keep they mayn't keep
V-ing form
I mayn't be keeping you mayn't be keeping she mayn't be keeping we mayn't be keeping you mayn't be keeping they mayn't be keeping
Perfect
I mayn't have kept you mayn't have kept she mayn't have kept we mayn't have kept you mayn't have kept they mayn't have kept
V-ing perfect
I mayn't have been keeping you mayn't have been keeping she mayn't have been keeping we mayn't have been keeping you mayn't have been keeping they mayn't have been keeping
Interrogative form
Simple form
may I keep? may you keep? may she keep? may we keep? may you keep? may they keep?
V-ing form
may I be keeping? may you be keeping? may she be keeping? may we be keeping? may you be keeping? may they be keeping?
Perfect
may I have kept? may you have kept? may she have kept? may we have kept? may you have kept? may they have kept?
V-ing perfect
may I have been keeping? may you have been keeping? may she have been keeping? may we have been keeping? may you have been keeping? may they have been keeping?
Interro-negative form
Simple form
mayn't I keep? mayn't you keep? mayn't she keep? mayn't we keep? mayn't you keep? mayn't they keep?
V-ing form
mayn't I be keeping? mayn't you be keeping? mayn't she be keeping? mayn't we be keeping? mayn't you be keeping? mayn't they be keeping?
Perfect
mayn't I have kept? mayn't you have kept? mayn't she have kept? mayn't we have kept? mayn't you have kept? mayn't they have kept?
V-ing perfect
mayn't I have been keeping? mayn't you have been keeping? mayn't she have been keeping? mayn't we have been keeping? mayn't you have been keeping? mayn't they have been keeping?