I may compete you may compete she may compete we may compete you may compete they may compete
V-ing form
I may be competing you may be competing she may be competing we may be competing you may be competing they may be competing
Perfect
I may have competed you may have competed she 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 she 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 she 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 she 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 she 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 she 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 she compete? may we compete? may you compete? may they compete?
V-ing form
may I be competing? may you be competing? may she be competing? may we be competing? may you be competing? may they be competing?
Perfect
may I have competed? may you have competed? may she 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 she 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 she 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 she 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 she 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 she have been competing? mayn't we have been competing? mayn't you have been competing? mayn't they have been competing?