I may button you may button he may button we may button you may button they may button
V-ing form
I may be buttoning you may be buttoning he may be buttoning we may be buttoning you may be buttoning they may be buttoning
Perfect
I may have buttoned you may have buttoned he may have buttoned we may have buttoned you may have buttoned they may have buttoned
V-ing perfect
I may have been buttoning you may have been buttoning he may have been buttoning we may have been buttoning you may have been buttoning they may have been buttoning
Negation
Simple form
I mayn't button you mayn't button he mayn't button we mayn't button you mayn't button they mayn't button
V-ing form
I mayn't be buttoning you mayn't be buttoning he mayn't be buttoning we mayn't be buttoning you mayn't be buttoning they mayn't be buttoning
Perfect
I mayn't have buttoned you mayn't have buttoned he mayn't have buttoned we mayn't have buttoned you mayn't have buttoned they mayn't have buttoned
V-ing perfect
I mayn't have been buttoning you mayn't have been buttoning he mayn't have been buttoning we mayn't have been buttoning you mayn't have been buttoning they mayn't have been buttoning
Interrogative form
Simple form
may I button? may you button? may he button? may we button? may you button? may they button?
V-ing form
may I be buttoning? may you be buttoning? may he be buttoning? may we be buttoning? may you be buttoning? may they be buttoning?
Perfect
may I have buttoned? may you have buttoned? may he have buttoned? may we have buttoned? may you have buttoned? may they have buttoned?
V-ing perfect
may I have been buttoning? may you have been buttoning? may he have been buttoning? may we have been buttoning? may you have been buttoning? may they have been buttoning?
Interro-negative form
Simple form
mayn't I button? mayn't you button? mayn't he button? mayn't we button? mayn't you button? mayn't they button?
V-ing form
mayn't I be buttoning? mayn't you be buttoning? mayn't he be buttoning? mayn't we be buttoning? mayn't you be buttoning? mayn't they be buttoning?
Perfect
mayn't I have buttoned? mayn't you have buttoned? mayn't he have buttoned? mayn't we have buttoned? mayn't you have buttoned? mayn't they have buttoned?
V-ing perfect
mayn't I have been buttoning? mayn't you have been buttoning? mayn't he have been buttoning? mayn't we have been buttoning? mayn't you have been buttoning? mayn't they have been buttoning?