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