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