English verb conjugation
MUST PREANNOUNCE

Regular verb: preannounce - preannounced - preannounced

Affirmation

Simple form	V-ing form
I must preannounce you must preannounce he must preannounce we must preannounce you must preannounce they must preannounce	I must be preannouncing you must be preannouncing he must be preannouncing we must be preannouncing you must be preannouncing they must be preannouncing
Perfect	V-ing perfect
I must have preannounced you must have preannounced he must have preannounced we must have preannounced you must have preannounced they must have preannounced	I must have been preannouncing you must have been preannouncing he must have been preannouncing we must have been preannouncing you must have been preannouncing they must have been preannouncing

Negation

Simple form	V-ing form
I mustn't preannounce you mustn't preannounce he mustn't preannounce we mustn't preannounce you mustn't preannounce they mustn't preannounce	I mustn't be preannouncing you mustn't be preannouncing he mustn't be preannouncing we mustn't be preannouncing you mustn't be preannouncing they mustn't be preannouncing
Perfect	V-ing perfect
I mustn't have preannounced you mustn't have preannounced he mustn't have preannounced we mustn't have preannounced you mustn't have preannounced they mustn't have preannounced	I mustn't have been preannouncing you mustn't have been preannouncing he mustn't have been preannouncing we mustn't have been preannouncing you mustn't have been preannouncing they mustn't have been preannouncing

Interrogative form

Simple form	V-ing form
must I preannounce? must you preannounce? must he preannounce? must we preannounce? must you preannounce? must they preannounce?	must I be preannouncing? must you be preannouncing? must he be preannouncing? must we be preannouncing? must you be preannouncing? must they be preannouncing?
Perfect	V-ing perfect
must I have preannounced? must you have preannounced? must he have preannounced? must we have preannounced? must you have preannounced? must they have preannounced?	must I have been preannouncing? must you have been preannouncing? must he have been preannouncing? must we have been preannouncing? must you have been preannouncing? must they have been preannouncing?

Interro-negative form

Simple form	V-ing form
mustn't I preannounce? mustn't you preannounce? mustn't he preannounce? mustn't we preannounce? mustn't you preannounce? mustn't they preannounce?	mustn't I be preannouncing? mustn't you be preannouncing? mustn't he be preannouncing? mustn't we be preannouncing? mustn't you be preannouncing? mustn't they be preannouncing?
Perfect	V-ing perfect
mustn't I have preannounced? mustn't you have preannounced? mustn't he have preannounced? mustn't we have preannounced? mustn't you have preannounced? mustn't they have preannounced?	mustn't I have been preannouncing? mustn't you have been preannouncing? mustn't he have been preannouncing? mustn't we have been preannouncing? mustn't you have been preannouncing? mustn't they have been preannouncing?