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