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