I may undergo you may undergo she may undergo we may undergo you may undergo they may undergo
V-ing form
I may be undergoing you may be undergoing she may be undergoing we may be undergoing you may be undergoing they may be undergoing
Perfect
I may have undergone you may have undergone she may have undergone we may have undergone you may have undergone they may have undergone
V-ing perfect
I may have been undergoing you may have been undergoing she may have been undergoing we may have been undergoing you may have been undergoing they may have been undergoing
Negation
Simple form
I mayn't undergo you mayn't undergo she mayn't undergo we mayn't undergo you mayn't undergo they mayn't undergo
V-ing form
I mayn't be undergoing you mayn't be undergoing she mayn't be undergoing we mayn't be undergoing you mayn't be undergoing they mayn't be undergoing
Perfect
I mayn't have undergone you mayn't have undergone she mayn't have undergone we mayn't have undergone you mayn't have undergone they mayn't have undergone
V-ing perfect
I mayn't have been undergoing you mayn't have been undergoing she mayn't have been undergoing we mayn't have been undergoing you mayn't have been undergoing they mayn't have been undergoing
Interrogative form
Simple form
may I undergo? may you undergo? may she undergo? may we undergo? may you undergo? may they undergo?
V-ing form
may I be undergoing? may you be undergoing? may she be undergoing? may we be undergoing? may you be undergoing? may they be undergoing?
Perfect
may I have undergone? may you have undergone? may she have undergone? may we have undergone? may you have undergone? may they have undergone?
V-ing perfect
may I have been undergoing? may you have been undergoing? may she have been undergoing? may we have been undergoing? may you have been undergoing? may they have been undergoing?
Interro-negative form
Simple form
mayn't I undergo? mayn't you undergo? mayn't she undergo? mayn't we undergo? mayn't you undergo? mayn't they undergo?
V-ing form
mayn't I be undergoing? mayn't you be undergoing? mayn't she be undergoing? mayn't we be undergoing? mayn't you be undergoing? mayn't they be undergoing?
Perfect
mayn't I have undergone? mayn't you have undergone? mayn't she have undergone? mayn't we have undergone? mayn't you have undergone? mayn't they have undergone?
V-ing perfect
mayn't I have been undergoing? mayn't you have been undergoing? mayn't she have been undergoing? mayn't we have been undergoing? mayn't you have been undergoing? mayn't they have been undergoing?