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