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