I must barge you must barge he must barge we must barge you must barge they must barge
V-ing form
I must be barging you must be barging he must be barging we must be barging you must be barging they must be barging
Perfect
I must have barged you must have barged he must have barged we must have barged you must have barged they must have barged
V-ing perfect
I must have been barging you must have been barging he must have been barging we must have been barging you must have been barging they must have been barging
Negation
Simple form
I mustn't barge you mustn't barge he mustn't barge we mustn't barge you mustn't barge they mustn't barge
V-ing form
I mustn't be barging you mustn't be barging he mustn't be barging we mustn't be barging you mustn't be barging they mustn't be barging
Perfect
I mustn't have barged you mustn't have barged he mustn't have barged we mustn't have barged you mustn't have barged they mustn't have barged
V-ing perfect
I mustn't have been barging you mustn't have been barging he mustn't have been barging we mustn't have been barging you mustn't have been barging they mustn't have been barging
Interrogative form
Simple form
must I barge? must you barge? must he barge? must we barge? must you barge? must they barge?
V-ing form
must I be barging? must you be barging? must he be barging? must we be barging? must you be barging? must they be barging?
Perfect
must I have barged? must you have barged? must he have barged? must we have barged? must you have barged? must they have barged?
V-ing perfect
must I have been barging? must you have been barging? must he have been barging? must we have been barging? must you have been barging? must they have been barging?
Interro-negative form
Simple form
mustn't I barge? mustn't you barge? mustn't he barge? mustn't we barge? mustn't you barge? mustn't they barge?
V-ing form
mustn't I be barging? mustn't you be barging? mustn't he be barging? mustn't we be barging? mustn't you be barging? mustn't they be barging?
Perfect
mustn't I have barged? mustn't you have barged? mustn't he have barged? mustn't we have barged? mustn't you have barged? mustn't they have barged?
V-ing perfect
mustn't I have been barging? mustn't you have been barging? mustn't he have been barging? mustn't we have been barging? mustn't you have been barging? mustn't they have been barging?