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