Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must officer you must officer he must officer we must officer you must officer they must officer
V-ing form
I must be officering you must be officering he must be officering we must be officering you must be officering they must be officering
Perfect
I must have officered you must have officered he must have officered we must have officered you must have officered they must have officered
V-ing perfect
I must have been officering you must have been officering he must have been officering we must have been officering you must have been officering they must have been officering
Negation
Simple form
I mustn't officer you mustn't officer he mustn't officer we mustn't officer you mustn't officer they mustn't officer
V-ing form
I mustn't be officering you mustn't be officering he mustn't be officering we mustn't be officering you mustn't be officering they mustn't be officering
Perfect
I mustn't have officered you mustn't have officered he mustn't have officered we mustn't have officered you mustn't have officered they mustn't have officered
V-ing perfect
I mustn't have been officering you mustn't have been officering he mustn't have been officering we mustn't have been officering you mustn't have been officering they mustn't have been officering
Interrogative form
Simple form
must I officer? must you officer? must he officer? must we officer? must you officer? must they officer?
V-ing form
must I be officering? must you be officering? must he be officering? must we be officering? must you be officering? must they be officering?
Perfect
must I have officered? must you have officered? must he have officered? must we have officered? must you have officered? must they have officered?
V-ing perfect
must I have been officering? must you have been officering? must he have been officering? must we have been officering? must you have been officering? must they have been officering?
Interro-negative form
Simple form
mustn't I officer? mustn't you officer? mustn't he officer? mustn't we officer? mustn't you officer? mustn't they officer?
V-ing form
mustn't I be officering? mustn't you be officering? mustn't he be officering? mustn't we be officering? mustn't you be officering? mustn't they be officering?
Perfect
mustn't I have officered? mustn't you have officered? mustn't he have officered? mustn't we have officered? mustn't you have officered? mustn't they have officered?
V-ing perfect
mustn't I have been officering? mustn't you have been officering? mustn't he have been officering? mustn't we have been officering? mustn't you have been officering? mustn't they have been officering?