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