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