Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I may dinner you may dinner he may dinner we may dinner you may dinner they may dinner
V-ing form
I may be dinnering you may be dinnering he may be dinnering we may be dinnering you may be dinnering they may be dinnering
Perfect
I may have dinnered you may have dinnered he may have dinnered we may have dinnered you may have dinnered they may have dinnered
V-ing perfect
I may have been dinnering you may have been dinnering he may have been dinnering we may have been dinnering you may have been dinnering they may have been dinnering
Negation
Simple form
I mayn't dinner you mayn't dinner he mayn't dinner we mayn't dinner you mayn't dinner they mayn't dinner
V-ing form
I mayn't be dinnering you mayn't be dinnering he mayn't be dinnering we mayn't be dinnering you mayn't be dinnering they mayn't be dinnering
Perfect
I mayn't have dinnered you mayn't have dinnered he mayn't have dinnered we mayn't have dinnered you mayn't have dinnered they mayn't have dinnered
V-ing perfect
I mayn't have been dinnering you mayn't have been dinnering he mayn't have been dinnering we mayn't have been dinnering you mayn't have been dinnering they mayn't have been dinnering
Interrogative form
Simple form
may I dinner? may you dinner? may he dinner? may we dinner? may you dinner? may they dinner?
V-ing form
may I be dinnering? may you be dinnering? may he be dinnering? may we be dinnering? may you be dinnering? may they be dinnering?
Perfect
may I have dinnered? may you have dinnered? may he have dinnered? may we have dinnered? may you have dinnered? may they have dinnered?
V-ing perfect
may I have been dinnering? may you have been dinnering? may he have been dinnering? may we have been dinnering? may you have been dinnering? may they have been dinnering?
Interro-negative form
Simple form
mayn't I dinner? mayn't you dinner? mayn't he dinner? mayn't we dinner? mayn't you dinner? mayn't they dinner?
V-ing form
mayn't I be dinnering? mayn't you be dinnering? mayn't he be dinnering? mayn't we be dinnering? mayn't you be dinnering? mayn't they be dinnering?
Perfect
mayn't I have dinnered? mayn't you have dinnered? mayn't he have dinnered? mayn't we have dinnered? mayn't you have dinnered? mayn't they have dinnered?
V-ing perfect
mayn't I have been dinnering? mayn't you have been dinnering? mayn't he have been dinnering? mayn't we have been dinnering? mayn't you have been dinnering? mayn't they have been dinnering?