I may telephone you may telephone he may telephone we may telephone you may telephone they may telephone
V-ing form
I may be telephoning you may be telephoning he may be telephoning we may be telephoning you may be telephoning they may be telephoning
Perfect
I may have telephoned you may have telephoned he 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 he 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 he 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 he 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 he 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 he 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 he telephone? may we telephone? may you telephone? may they telephone?
V-ing form
may I be telephoning? may you be telephoning? may he be telephoning? may we be telephoning? may you be telephoning? may they be telephoning?
Perfect
may I have telephoned? may you have telephoned? may he 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 he 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 he 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 he 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 he 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 he have been telephoning? mayn't we have been telephoning? mayn't you have been telephoning? mayn't they have been telephoning?