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