English verb conjugation
MUST PLAY

Regular verb: play - played - played

Affirmation

Simple form	V-ing form
I must play you must play he must play we must play you must play they must play	I must be playing you must be playing he must be playing we must be playing you must be playing they must be playing
Perfect	V-ing perfect
I must have played you must have played he must have played we must have played you must have played they must have played	I must have been playing you must have been playing he must have been playing we must have been playing you must have been playing they must have been playing

Negation

Simple form	V-ing form
I mustn't play you mustn't play he mustn't play we mustn't play you mustn't play they mustn't play	I mustn't be playing you mustn't be playing he mustn't be playing we mustn't be playing you mustn't be playing they mustn't be playing
Perfect	V-ing perfect
I mustn't have played you mustn't have played he mustn't have played we mustn't have played you mustn't have played they mustn't have played	I mustn't have been playing you mustn't have been playing he mustn't have been playing we mustn't have been playing you mustn't have been playing they mustn't have been playing

Interrogative form

Simple form	V-ing form
must I play? must you play? must he play? must we play? must you play? must they play?	must I be playing? must you be playing? must he be playing? must we be playing? must you be playing? must they be playing?
Perfect	V-ing perfect
must I have played? must you have played? must he have played? must we have played? must you have played? must they have played?	must I have been playing? must you have been playing? must he have been playing? must we have been playing? must you have been playing? must they have been playing?

Interro-negative form

Simple form	V-ing form
mustn't I play? mustn't you play? mustn't he play? mustn't we play? mustn't you play? mustn't they play?	mustn't I be playing? mustn't you be playing? mustn't he be playing? mustn't we be playing? mustn't you be playing? mustn't they be playing?
Perfect	V-ing perfect
mustn't I have played? mustn't you have played? mustn't he have played? mustn't we have played? mustn't you have played? mustn't they have played?	mustn't I have been playing? mustn't you have been playing? mustn't he have been playing? mustn't we have been playing? mustn't you have been playing? mustn't they have been playing?