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