I may perform you may perform he may perform we may perform you may perform they may perform
V-ing form
I may be performing you may be performing he may be performing we may be performing you may be performing they may be performing
Perfect
I may have performed you may have performed he may have performed we may have performed you may have performed they may have performed
V-ing perfect
I may have been performing you may have been performing he may have been performing we may have been performing you may have been performing they may have been performing
Negation
Simple form
I mayn't perform you mayn't perform he mayn't perform we mayn't perform you mayn't perform they mayn't perform
V-ing form
I mayn't be performing you mayn't be performing he mayn't be performing we mayn't be performing you mayn't be performing they mayn't be performing
Perfect
I mayn't have performed you mayn't have performed he mayn't have performed we mayn't have performed you mayn't have performed they mayn't have performed
V-ing perfect
I mayn't have been performing you mayn't have been performing he mayn't have been performing we mayn't have been performing you mayn't have been performing they mayn't have been performing
Interrogative form
Simple form
may I perform? may you perform? may he perform? may we perform? may you perform? may they perform?
V-ing form
may I be performing? may you be performing? may he be performing? may we be performing? may you be performing? may they be performing?
Perfect
may I have performed? may you have performed? may he have performed? may we have performed? may you have performed? may they have performed?
V-ing perfect
may I have been performing? may you have been performing? may he have been performing? may we have been performing? may you have been performing? may they have been performing?
Interro-negative form
Simple form
mayn't I perform? mayn't you perform? mayn't he perform? mayn't we perform? mayn't you perform? mayn't they perform?
V-ing form
mayn't I be performing? mayn't you be performing? mayn't he be performing? mayn't we be performing? mayn't you be performing? mayn't they be performing?
Perfect
mayn't I have performed? mayn't you have performed? mayn't he have performed? mayn't we have performed? mayn't you have performed? mayn't they have performed?
V-ing perfect
mayn't I have been performing? mayn't you have been performing? mayn't he have been performing? mayn't we have been performing? mayn't you have been performing? mayn't they have been performing?