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 must not barge you must not barge he must not barge we must not barge you must not barge they must not barge
V-ing form
I must not be barging you must not be barging he must not be barging we must not be barging you must not be barging they must not be barging
Perfect
I must not have barged you must not have barged he must not have barged we must not have barged you must not have barged they must not have barged
V-ing perfect
I must not have been barging you must not have been barging he must not have been barging we must not have been barging you must not have been barging they must not 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
must I not barge? must you not barge? must he not barge? must we not barge? must you not barge? must they not barge?
V-ing form
must I not be barging? must you not be barging? must he not be barging? must we not be barging? must you not be barging? must they not be barging?
Perfect
must I not have barged? must you not have barged? must he not have barged? must we not have barged? must you not have barged? must they not have barged?
V-ing perfect
must I not have been barging? must you not have been barging? must he not have been barging? must we not have been barging? must you not have been barging? must they not have been barging?