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