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