must preannounce
Regular verb: preannounce - preannounced- preannounced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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	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 	Perfect 	V-ing perfect 	
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? 	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 	Perfect 	V-ing perfect 	
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? 	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?