I may modify you may modify she may modify we may modify you may modify they may modify
V-ing form
I may be modifying you may be modifying she may be modifying we may be modifying you may be modifying they may be modifying
Perfect
I may have modified you may have modified she may have modified we may have modified you may have modified they may have modified
V-ing perfect
I may have been modifying you may have been modifying she may have been modifying we may have been modifying you may have been modifying they may have been modifying
Negation
Simple form
I may not modify you may not modify she may not modify we may not modify you may not modify they may not modify
V-ing form
I may not be modifying you may not be modifying she may not be modifying we may not be modifying you may not be modifying they may not be modifying
Perfect
I may not have modified you may not have modified she may not have modified we may not have modified you may not have modified they may not have modified
V-ing perfect
I may not have been modifying you may not have been modifying she may not have been modifying we may not have been modifying you may not have been modifying they may not have been modifying
Interrogative form
Simple form
may I modify? may you modify? may she modify? may we modify? may you modify? may they modify?
V-ing form
may I be modifying? may you be modifying? may she be modifying? may we be modifying? may you be modifying? may they be modifying?
Perfect
may I have modified? may you have modified? may she have modified? may we have modified? may you have modified? may they have modified?
V-ing perfect
may I have been modifying? may you have been modifying? may she have been modifying? may we have been modifying? may you have been modifying? may they have been modifying?
Interro-negative form
Simple form
may I not modify? may you not modify? may she not modify? may we not modify? may you not modify? may they not modify?
V-ing form
may I not be modifying? may you not be modifying? may she not be modifying? may we not be modifying? may you not be modifying? may they not be modifying?
Perfect
may I not have modified? may you not have modified? may she not have modified? may we not have modified? may you not have modified? may they not have modified?
V-ing perfect
may I not have been modifying? may you not have been modifying? may she not have been modifying? may we not have been modifying? may you not have been modifying? may they not have been modifying?