English verb conjugation
MUST PERFORM

Regular verb: perform - performed - performed

Affirmation

Simple form	V-ing form
I must perform you must perform he must perform we must perform you must perform they must perform	I must be performing you must be performing he must be performing we must be performing you must be performing they must be performing
Perfect	V-ing perfect
I must have performed you must have performed he must have performed we must have performed you must have performed they must have performed	I must have been performing you must have been performing he must have been performing we must have been performing you must have been performing they must have been performing

Negation

Simple form	V-ing form
I mustn't perform you mustn't perform he mustn't perform we mustn't perform you mustn't perform they mustn't perform	I mustn't be performing you mustn't be performing he mustn't be performing we mustn't be performing you mustn't be performing they mustn't be performing
Perfect	V-ing perfect
I mustn't have performed you mustn't have performed he mustn't have performed we mustn't have performed you mustn't have performed they mustn't have performed	I mustn't have been performing you mustn't have been performing he mustn't have been performing we mustn't have been performing you mustn't have been performing they mustn't have been performing

Interrogative form

Simple form	V-ing form
must I perform? must you perform? must he perform? must we perform? must you perform? must they perform?	must I be performing? must you be performing? must he be performing? must we be performing? must you be performing? must they be performing?
Perfect	V-ing perfect
must I have performed? must you have performed? must he have performed? must we have performed? must you have performed? must they have performed?	must I have been performing? must you have been performing? must he have been performing? must we have been performing? must you have been performing? must they have been performing?

Interro-negative form

Simple form	V-ing form
mustn't I perform? mustn't you perform? mustn't he perform? mustn't we perform? mustn't you perform? mustn't they perform?	mustn't I be performing? mustn't you be performing? mustn't he be performing? mustn't we be performing? mustn't you be performing? mustn't they be performing?
Perfect	V-ing perfect
mustn't I have performed? mustn't you have performed? mustn't he have performed? mustn't we have performed? mustn't you have performed? mustn't they have performed?	mustn't I have been performing? mustn't you have been performing? mustn't he have been performing? mustn't we have been performing? mustn't you have been performing? mustn't they have been performing?