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