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