I may butt you may butt she may butt we may butt you may butt they may butt
V-ing form
I may be butting you may be butting she may be butting we may be butting you may be butting they may be butting
Perfect
I may have butted you may have butted she may have butted we may have butted you may have butted they may have butted
V-ing perfect
I may have been butting you may have been butting she may have been butting we may have been butting you may have been butting they may have been butting
Negation
Simple form
I may not butt you may not butt she may not butt we may not butt you may not butt they may not butt
V-ing form
I may not be butting you may not be butting she may not be butting we may not be butting you may not be butting they may not be butting
Perfect
I may not have butted you may not have butted she may not have butted we may not have butted you may not have butted they may not have butted
V-ing perfect
I may not have been butting you may not have been butting she may not have been butting we may not have been butting you may not have been butting they may not have been butting
Interrogative form
Simple form
may I butt? may you butt? may she butt? may we butt? may you butt? may they butt?
V-ing form
may I be butting? may you be butting? may she be butting? may we be butting? may you be butting? may they be butting?
Perfect
may I have butted? may you have butted? may she have butted? may we have butted? may you have butted? may they have butted?
V-ing perfect
may I have been butting? may you have been butting? may she have been butting? may we have been butting? may you have been butting? may they have been butting?
Interro-negative form
Simple form
may I not butt? may you not butt? may she not butt? may we not butt? may you not butt? may they not butt?
V-ing form
may I not be butting? may you not be butting? may she not be butting? may we not be butting? may you not be butting? may they not be butting?
Perfect
may I not have butted? may you not have butted? may she not have butted? may we not have butted? may you not have butted? may they not have butted?
V-ing perfect
may I not have been butting? may you not have been butting? may she not have been butting? may we not have been butting? may you not have been butting? may they not have been butting?