I may unbutton you may unbutton he may unbutton we may unbutton you may unbutton they may unbutton
V-ing form
I may be unbuttoning you may be unbuttoning he may be unbuttoning we may be unbuttoning you may be unbuttoning they may be unbuttoning
Perfect
I may have unbuttoned you may have unbuttoned he may have unbuttoned we may have unbuttoned you may have unbuttoned they may have unbuttoned
V-ing perfect
I may have been unbuttoning you may have been unbuttoning he may have been unbuttoning we may have been unbuttoning you may have been unbuttoning they may have been unbuttoning
Negation
Simple form
I may not unbutton you may not unbutton he may not unbutton we may not unbutton you may not unbutton they may not unbutton
V-ing form
I may not be unbuttoning you may not be unbuttoning he may not be unbuttoning we may not be unbuttoning you may not be unbuttoning they may not be unbuttoning
Perfect
I may not have unbuttoned you may not have unbuttoned he may not have unbuttoned we may not have unbuttoned you may not have unbuttoned they may not have unbuttoned
V-ing perfect
I may not have been unbuttoning you may not have been unbuttoning he may not have been unbuttoning we may not have been unbuttoning you may not have been unbuttoning they may not have been unbuttoning
Interrogative form
Simple form
may I unbutton? may you unbutton? may he unbutton? may we unbutton? may you unbutton? may they unbutton?
V-ing form
may I be unbuttoning? may you be unbuttoning? may he be unbuttoning? may we be unbuttoning? may you be unbuttoning? may they be unbuttoning?
Perfect
may I have unbuttoned? may you have unbuttoned? may he have unbuttoned? may we have unbuttoned? may you have unbuttoned? may they have unbuttoned?
V-ing perfect
may I have been unbuttoning? may you have been unbuttoning? may he have been unbuttoning? may we have been unbuttoning? may you have been unbuttoning? may they have been unbuttoning?
Interro-negative form
Simple form
may I not unbutton? may you not unbutton? may he not unbutton? may we not unbutton? may you not unbutton? may they not unbutton?
V-ing form
may I not be unbuttoning? may you not be unbuttoning? may he not be unbuttoning? may we not be unbuttoning? may you not be unbuttoning? may they not be unbuttoning?
Perfect
may I not have unbuttoned? may you not have unbuttoned? may he not have unbuttoned? may we not have unbuttoned? may you not have unbuttoned? may they not have unbuttoned?
V-ing perfect
may I not have been unbuttoning? may you not have been unbuttoning? may he not have been unbuttoning? may we not have been unbuttoning? may you not have been unbuttoning? may they not have been unbuttoning?