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