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