I may sleep you may sleep he may sleep we may sleep you may sleep they may sleep
V-ing form
I may be sleeping you may be sleeping he may be sleeping we may be sleeping you may be sleeping they may be sleeping
Perfect
I may have slept you may have slept he may have slept we may have slept you may have slept they may have slept
V-ing perfect
I may have been sleeping you may have been sleeping he may have been sleeping we may have been sleeping you may have been sleeping they may have been sleeping
Negation
Simple form
I mayn't sleep you mayn't sleep he mayn't sleep we mayn't sleep you mayn't sleep they mayn't sleep
V-ing form
I mayn't be sleeping you mayn't be sleeping he mayn't be sleeping we mayn't be sleeping you mayn't be sleeping they mayn't be sleeping
Perfect
I mayn't have slept you mayn't have slept he mayn't have slept we mayn't have slept you mayn't have slept they mayn't have slept
V-ing perfect
I mayn't have been sleeping you mayn't have been sleeping he mayn't have been sleeping we mayn't have been sleeping you mayn't have been sleeping they mayn't have been sleeping
Interrogative form
Simple form
may I sleep? may you sleep? may he sleep? may we sleep? may you sleep? may they sleep?
V-ing form
may I be sleeping? may you be sleeping? may he be sleeping? may we be sleeping? may you be sleeping? may they be sleeping?
Perfect
may I have slept? may you have slept? may he have slept? may we have slept? may you have slept? may they have slept?
V-ing perfect
may I have been sleeping? may you have been sleeping? may he have been sleeping? may we have been sleeping? may you have been sleeping? may they have been sleeping?
Interro-negative form
Simple form
mayn't I sleep? mayn't you sleep? mayn't he sleep? mayn't we sleep? mayn't you sleep? mayn't they sleep?
V-ing form
mayn't I be sleeping? mayn't you be sleeping? mayn't he be sleeping? mayn't we be sleeping? mayn't you be sleeping? mayn't they be sleeping?
Perfect
mayn't I have slept? mayn't you have slept? mayn't he have slept? mayn't we have slept? mayn't you have slept? mayn't they have slept?
V-ing perfect
mayn't I have been sleeping? mayn't you have been sleeping? mayn't he have been sleeping? mayn't we have been sleeping? mayn't you have been sleeping? mayn't they have been sleeping?