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