I may sign you may sign she may sign we may sign you may sign they may sign
V-ing form
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
I may have signed you may have signed she 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 she may have been signing we may have been signing you may have been signing they may have been signing
Negation
Simple form
I may not sign you may not sign she may not sign we may not sign you may not sign they may not sign
V-ing form
I may not be signing you may not be signing she may not be signing we may not be signing you may not be signing they may not be signing
Perfect
I may not have signed you may not have signed she may not have signed we may not have signed you may not have signed they may not have signed
V-ing perfect
I may not have been signing you may not have been signing she may not have been signing we may not have been signing you may not have been signing they may not have been signing
Interrogative form
Simple form
may I sign? may you sign? may she sign? may we sign? may you sign? may they sign?
V-ing form
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
may I have signed? may you have signed? may she 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 she have been signing? may we have been signing? may you have been signing? may they have been signing?
Interro-negative form
Simple form
may I not sign? may you not sign? may she not sign? may we not sign? may you not sign? may they not sign?
V-ing form
may I not be signing? may you not be signing? may she not be signing? may we not be signing? may you not be signing? may they not be signing?
Perfect
may I not have signed? may you not have signed? may she not have signed? may we not have signed? may you not have signed? may they not have signed?
V-ing perfect
may I not have been signing? may you not have been signing? may she not have been signing? may we not have been signing? may you not have been signing? may they not have been signing?