English verb conjugation
MAY SIGN

Regular verb: sign - signed - signed

Affirmation

Simple form	V-ing form
I may sign you may sign she may sign we may sign you may sign they may sign	I may be signing you may be signing she may be signing we may be signing you may be signing they may be signing
Perfect	V-ing perfect
I may have signed you may have signed she may have signed we may have signed you may have signed they may have signed	I may have been signing you may have been signing she may have been signing we may have been signing you may have been signing they may have been signing

Negation

Simple form	V-ing form
I mayn't sign you mayn't sign she mayn't sign we mayn't sign you mayn't sign they mayn't sign	I mayn't be signing you mayn't be signing she mayn't be signing we mayn't be signing you mayn't be signing they mayn't be signing
Perfect	V-ing perfect
I mayn't have signed you mayn't have signed she mayn't have signed we mayn't have signed you mayn't have signed they mayn't have signed	I mayn't have been signing you mayn't have been signing she 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	V-ing form
may I sign? may you sign? may she sign? may we sign? may you sign? may they sign?	may I be signing? may you be signing? may she be signing? may we be signing? may you be signing? may they be signing?
Perfect	V-ing perfect
may I have signed? may you have signed? may she have signed? may we have signed? may you have signed? may they have signed?	may I have been signing? may you have been signing? may she have been signing? may we have been signing? may you have been signing? may they have been signing?

Interro-negative form

Simple form	V-ing form
mayn't I sign? mayn't you sign? mayn't she sign? mayn't we sign? mayn't you sign? mayn't they sign?	mayn't I be signing? mayn't you be signing? mayn't she be signing? mayn't we be signing? mayn't you be signing? mayn't they be signing?
Perfect	V-ing perfect
mayn't I have signed? mayn't you have signed? mayn't she have signed? mayn't we have signed? mayn't you have signed? mayn't they have signed?	mayn't I have been signing? mayn't you have been signing? mayn't she have been signing? mayn't we have been signing? mayn't you have been signing? mayn't they have been signing?