I may unbutton you may unbutton she may unbutton we may unbutton you may unbutton they may unbutton
V-ing form
I may be unbuttoning you may be unbuttoning she may be unbuttoning we may be unbuttoning you may be unbuttoning they may be unbuttoning
Perfect
I may have unbuttoned you may have unbuttoned she 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 she may have been unbuttoning we may have been unbuttoning you may have been unbuttoning they may have been unbuttoning
Negation
Simple form
I mayn't unbutton you mayn't unbutton she mayn't unbutton we mayn't unbutton you mayn't unbutton they mayn't unbutton
V-ing form
I mayn't be unbuttoning you mayn't be unbuttoning she mayn't be unbuttoning we mayn't be unbuttoning you mayn't be unbuttoning they mayn't be unbuttoning
Perfect
I mayn't have unbuttoned you mayn't have unbuttoned she mayn't have unbuttoned we mayn't have unbuttoned you mayn't have unbuttoned they mayn't have unbuttoned
V-ing perfect
I mayn't have been unbuttoning you mayn't have been unbuttoning she mayn't have been unbuttoning we mayn't have been unbuttoning you mayn't have been unbuttoning they mayn't have been unbuttoning
Interrogative form
Simple form
may I unbutton? may you unbutton? may she unbutton? may we unbutton? may you unbutton? may they unbutton?
V-ing form
may I be unbuttoning? may you be unbuttoning? may she be unbuttoning? may we be unbuttoning? may you be unbuttoning? may they be unbuttoning?
Perfect
may I have unbuttoned? may you have unbuttoned? may she 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 she have been unbuttoning? may we have been unbuttoning? may you have been unbuttoning? may they have been unbuttoning?
Interro-negative form
Simple form
mayn't I unbutton? mayn't you unbutton? mayn't she unbutton? mayn't we unbutton? mayn't you unbutton? mayn't they unbutton?
V-ing form
mayn't I be unbuttoning? mayn't you be unbuttoning? mayn't she be unbuttoning? mayn't we be unbuttoning? mayn't you be unbuttoning? mayn't they be unbuttoning?
Perfect
mayn't I have unbuttoned? mayn't you have unbuttoned? mayn't she have unbuttoned? mayn't we have unbuttoned? mayn't you have unbuttoned? mayn't they have unbuttoned?
V-ing perfect
mayn't I have been unbuttoning? mayn't you have been unbuttoning? mayn't she have been unbuttoning? mayn't we have been unbuttoning? mayn't you have been unbuttoning? mayn't they have been unbuttoning?