I must officiate you must officiate she must officiate we must officiate you must officiate they must officiate
V-ing form
I must be officiating you must be officiating she must be officiating we must be officiating you must be officiating they must be officiating
Perfect
I must have officiated you must have officiated she must have officiated we must have officiated you must have officiated they must have officiated
V-ing perfect
I must have been officiating you must have been officiating she must have been officiating we must have been officiating you must have been officiating they must have been officiating
Negation
Simple form
I must not officiate you must not officiate she must not officiate we must not officiate you must not officiate they must not officiate
V-ing form
I must not be officiating you must not be officiating she must not be officiating we must not be officiating you must not be officiating they must not be officiating
Perfect
I must not have officiated you must not have officiated she must not have officiated we must not have officiated you must not have officiated they must not have officiated
V-ing perfect
I must not have been officiating you must not have been officiating she must not have been officiating we must not have been officiating you must not have been officiating they must not have been officiating
Interrogative form
Simple form
must I officiate? must you officiate? must she officiate? must we officiate? must you officiate? must they officiate?
V-ing form
must I be officiating? must you be officiating? must she be officiating? must we be officiating? must you be officiating? must they be officiating?
Perfect
must I have officiated? must you have officiated? must she have officiated? must we have officiated? must you have officiated? must they have officiated?
V-ing perfect
must I have been officiating? must you have been officiating? must she have been officiating? must we have been officiating? must you have been officiating? must they have been officiating?
Interro-negative form
Simple form
must I not officiate? must you not officiate? must she not officiate? must we not officiate? must you not officiate? must they not officiate?
V-ing form
must I not be officiating? must you not be officiating? must she not be officiating? must we not be officiating? must you not be officiating? must they not be officiating?
Perfect
must I not have officiated? must you not have officiated? must she not have officiated? must we not have officiated? must you not have officiated? must they not have officiated?
V-ing perfect
must I not have been officiating? must you not have been officiating? must she not have been officiating? must we not have been officiating? must you not have been officiating? must they not have been officiating?