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