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