I may stand you may stand he may stand we may stand you may stand they may stand
V-ing form
I may be standing you may be standing he may be standing we may be standing you may be standing they may be standing
Perfect
I may have stood you may have stood he may have stood we may have stood you may have stood they may have stood
V-ing perfect
I may have been standing you may have been standing he may have been standing we may have been standing you may have been standing they may have been standing
Negation
Simple form
I mayn't stand you mayn't stand he mayn't stand we mayn't stand you mayn't stand they mayn't stand
V-ing form
I mayn't be standing you mayn't be standing he mayn't be standing we mayn't be standing you mayn't be standing they mayn't be standing
Perfect
I mayn't have stood you mayn't have stood he mayn't have stood we mayn't have stood you mayn't have stood they mayn't have stood
V-ing perfect
I mayn't have been standing you mayn't have been standing he mayn't have been standing we mayn't have been standing you mayn't have been standing they mayn't have been standing
Interrogative form
Simple form
may I stand? may you stand? may he stand? may we stand? may you stand? may they stand?
V-ing form
may I be standing? may you be standing? may he be standing? may we be standing? may you be standing? may they be standing?
Perfect
may I have stood? may you have stood? may he have stood? may we have stood? may you have stood? may they have stood?
V-ing perfect
may I have been standing? may you have been standing? may he have been standing? may we have been standing? may you have been standing? may they have been standing?
Interro-negative form
Simple form
mayn't I stand? mayn't you stand? mayn't he stand? mayn't we stand? mayn't you stand? mayn't they stand?
V-ing form
mayn't I be standing? mayn't you be standing? mayn't he be standing? mayn't we be standing? mayn't you be standing? mayn't they be standing?
Perfect
mayn't I have stood? mayn't you have stood? mayn't he have stood? mayn't we have stood? mayn't you have stood? mayn't they have stood?
V-ing perfect
mayn't I have been standing? mayn't you have been standing? mayn't he have been standing? mayn't we have been standing? mayn't you have been standing? mayn't they have been standing?