I may brush you may brush he may brush we may brush you may brush they may brush
V-ing form
I may be brushing you may be brushing he may be brushing we may be brushing you may be brushing they may be brushing
Perfect
I may have brushed you may have brushed he 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 he 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 he 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 he 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 he 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 he 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 he brush? may we brush? may you brush? may they brush?
V-ing form
may I be brushing? may you be brushing? may he be brushing? may we be brushing? may you be brushing? may they be brushing?
Perfect
may I have brushed? may you have brushed? may he 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 he 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 he 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 he 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 he 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 he have been brushing? mayn't we have been brushing? mayn't you have been brushing? mayn't they have been brushing?