I may march you may march she may march we may march you may march they may march
V-ing form
I may be marching you may be marching she may be marching we may be marching you may be marching they may be marching
Perfect
I may have marched you may have marched she may have marched we may have marched you may have marched they may have marched
V-ing perfect
I may have been marching you may have been marching she may have been marching we may have been marching you may have been marching they may have been marching
Negation
Simple form
I may not march you may not march she may not march we may not march you may not march they may not march
V-ing form
I may not be marching you may not be marching she may not be marching we may not be marching you may not be marching they may not be marching
Perfect
I may not have marched you may not have marched she may not have marched we may not have marched you may not have marched they may not have marched
V-ing perfect
I may not have been marching you may not have been marching she may not have been marching we may not have been marching you may not have been marching they may not have been marching
Interrogative form
Simple form
may I march? may you march? may she march? may we march? may you march? may they march?
V-ing form
may I be marching? may you be marching? may she be marching? may we be marching? may you be marching? may they be marching?
Perfect
may I have marched? may you have marched? may she have marched? may we have marched? may you have marched? may they have marched?
V-ing perfect
may I have been marching? may you have been marching? may she have been marching? may we have been marching? may you have been marching? may they have been marching?
Interro-negative form
Simple form
may I not march? may you not march? may she not march? may we not march? may you not march? may they not march?
V-ing form
may I not be marching? may you not be marching? may she not be marching? may we not be marching? may you not be marching? may they not be marching?
Perfect
may I not have marched? may you not have marched? may she not have marched? may we not have marched? may you not have marched? may they not have marched?
V-ing perfect
may I not have been marching? may you not have been marching? may she not have been marching? may we not have been marching? may you not have been marching? may they not have been marching?