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 may not guard you may not guard he may not guard we may not guard you may not guard they may not guard
V-ing form
I may not be guarding you may not be guarding he may not be guarding we may not be guarding you may not be guarding they may not be guarding
Perfect
I may not have guarded you may not have guarded he may not have guarded we may not have guarded you may not have guarded they may not have guarded
V-ing perfect
I may not have been guarding you may not have been guarding he may not have been guarding we may not have been guarding you may not have been guarding they may not 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
may I not guard? may you not guard? may he not guard? may we not guard? may you not guard? may they not guard?
V-ing form
may I not be guarding? may you not be guarding? may he not be guarding? may we not be guarding? may you not be guarding? may they not be guarding?
Perfect
may I not have guarded? may you not have guarded? may he not have guarded? may we not have guarded? may you not have guarded? may they not have guarded?
V-ing perfect
may I not have been guarding? may you not have been guarding? may he not have been guarding? may we not have been guarding? may you not have been guarding? may they not have been guarding?