English verb conjugation
MUST LISTEN

Regular verb: listen - listened - listened

Affirmation

Simple form	V-ing form
I must listen you must listen he must listen we must listen you must listen they must listen	I must be listening you must be listening he must be listening we must be listening you must be listening they must be listening
Perfect	V-ing perfect
I must have listened you must have listened he must have listened we must have listened you must have listened they must have listened	I must have been listening you must have been listening he must have been listening we must have been listening you must have been listening they must have been listening

Negation

Simple form	V-ing form
I mustn't listen you mustn't listen he mustn't listen we mustn't listen you mustn't listen they mustn't listen	I mustn't be listening you mustn't be listening he mustn't be listening we mustn't be listening you mustn't be listening they mustn't be listening
Perfect	V-ing perfect
I mustn't have listened you mustn't have listened he mustn't have listened we mustn't have listened you mustn't have listened they mustn't have listened	I mustn't have been listening you mustn't have been listening he mustn't have been listening we mustn't have been listening you mustn't have been listening they mustn't have been listening

Interrogative form

Simple form	V-ing form
must I listen? must you listen? must he listen? must we listen? must you listen? must they listen?	must I be listening? must you be listening? must he be listening? must we be listening? must you be listening? must they be listening?
Perfect	V-ing perfect
must I have listened? must you have listened? must he have listened? must we have listened? must you have listened? must they have listened?	must I have been listening? must you have been listening? must he have been listening? must we have been listening? must you have been listening? must they have been listening?

Interro-negative form

Simple form	V-ing form
mustn't I listen? mustn't you listen? mustn't he listen? mustn't we listen? mustn't you listen? mustn't they listen?	mustn't I be listening? mustn't you be listening? mustn't he be listening? mustn't we be listening? mustn't you be listening? mustn't they be listening?
Perfect	V-ing perfect
mustn't I have listened? mustn't you have listened? mustn't he have listened? mustn't we have listened? mustn't you have listened? mustn't they have listened?	mustn't I have been listening? mustn't you have been listening? mustn't he have been listening? mustn't we have been listening? mustn't you have been listening? mustn't they have been listening?