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