I may keep you may keep he may keep we may keep you may keep they may keep
V-ing form
I may be keeping you may be keeping he may be keeping we may be keeping you may be keeping they may be keeping
Perfect
I may have kept you may have kept he 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 he 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 he 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 he 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 he 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 he 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 he keep? may we keep? may you keep? may they keep?
V-ing form
may I be keeping? may you be keeping? may he be keeping? may we be keeping? may you be keeping? may they be keeping?
Perfect
may I have kept? may you have kept? may he 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 he 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 he 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 he 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 he 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 he have been keeping? mayn't we have been keeping? mayn't you have been keeping? mayn't they have been keeping?