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