must officiate
Regular verb: officiate - officiated- officiated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must officiate
you must officiate
he must officiate
we must officiate
you must officiate
they must officiate 	I must be officiating
you must be officiating
he must be officiating
we must be officiating
you must be officiating
they must be officiating	I must have officiated
you must have officiated
he must have officiated
we must have officiated
you must have officiated
they must have officiated	I must have been officiating
you must have been officiating
he must have been officiating
we must have been officiating
you must have been officiating
they must have been officiating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't officiate
you mustn't officiate
he mustn't officiate
we mustn't officiate
you mustn't officiate
they mustn't officiate 	I mustn't be officiating
you mustn't be officiating
he mustn't be officiating
we mustn't be officiating
you mustn't be officiating
they mustn't be officiating	I mustn't have officiated
you mustn't have officiated
he mustn't have officiated
we mustn't have officiated
you mustn't have officiated
they mustn't have officiated	I mustn't have been officiating
you mustn't have been officiating
he mustn't have been officiating
we mustn't have been officiating
you mustn't have been officiating
they mustn't have been officiating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I officiate?
must you officiate?
must he officiate?
must we officiate?
must you officiate?
must they officiate? 	must I be officiating?
must you be officiating?
must he be officiating?
must we be officiating?
must you be officiating?
must they be officiating? 	must I have officiated?
must you have officiated?
must he have officiated?
must we have officiated?
must you have officiated?
must they have officiated? 	must I have been officiating?
must you have been officiating?
must he have been officiating?
must we have been officiating?
must you have been officiating?
must they have been officiating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I officiate?
mustn't you officiate?
mustn't he officiate?
mustn't we officiate?
mustn't you officiate?
mustn't they officiate? 	mustn't I be officiating?
mustn't you be officiating?
mustn't he be officiating?
mustn't we be officiating?
mustn't you be officiating?
mustn't they be officiating? 	mustn't I have officiated?
mustn't you have officiated?
mustn't he have officiated?
mustn't we have officiated?
mustn't you have officiated?
mustn't they have officiated? 	mustn't I have been officiating?
mustn't you have been officiating?
mustn't he have been officiating?
mustn't we have been officiating?
mustn't you have been officiating?
mustn't they have been officiating?