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 must not preannounce you must not preannounce he must not preannounce we must not preannounce you must not preannounce they must not preannounce	I must not be preannouncing you must not be preannouncing he must not be preannouncing we must not be preannouncing you must not be preannouncing they must not be preannouncing
Perfect	V-ing perfect
I must not have preannounced you must not have preannounced he must not have preannounced we must not have preannounced you must not have preannounced they must not have preannounced	I must not have been preannouncing you must not have been preannouncing he must not have been preannouncing we must not have been preannouncing you must not have been preannouncing they must not 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
must I not preannounce? must you not preannounce? must he not preannounce? must we not preannounce? must you not preannounce? must they not preannounce?	must I not be preannouncing? must you not be preannouncing? must he not be preannouncing? must we not be preannouncing? must you not be preannouncing? must they not be preannouncing?
Perfect	V-ing perfect
must I not have preannounced? must you not have preannounced? must he not have preannounced? must we not have preannounced? must you not have preannounced? must they not have preannounced?	must I not have been preannouncing? must you not have been preannouncing? must he not have been preannouncing? must we not have been preannouncing? must you not have been preannouncing? must they not have been preannouncing?