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