English verb conjugation
MUST PLAY

Regular verb: play - played - played

Affirmation

Simple form	V-ing form
I must play you must play she must play we must play you must play they must play	I must be playing you must be playing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she play? must we play? must you play? must they play?	must I be playing? must you be playing? must she 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 she 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 she 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 she 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 she 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 she 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 she have been playing? mustn't we have been playing? mustn't you have been playing? mustn't they have been playing?