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