I must bung you must bung she must bung we must bung you must bung they must bung
V-ing form
I must be bunging you must be bunging she must be bunging we must be bunging you must be bunging they must be bunging
Perfect
I must have bunged you must have bunged she must have bunged we must have bunged you must have bunged they must have bunged
V-ing perfect
I must have been bunging you must have been bunging she must have been bunging we must have been bunging you must have been bunging they must have been bunging
Negation
Simple form
I must not bung you must not bung she must not bung we must not bung you must not bung they must not bung
V-ing form
I must not be bunging you must not be bunging she must not be bunging we must not be bunging you must not be bunging they must not be bunging
Perfect
I must not have bunged you must not have bunged she must not have bunged we must not have bunged you must not have bunged they must not have bunged
V-ing perfect
I must not have been bunging you must not have been bunging she must not have been bunging we must not have been bunging you must not have been bunging they must not have been bunging
Interrogative form
Simple form
must I bung? must you bung? must she bung? must we bung? must you bung? must they bung?
V-ing form
must I be bunging? must you be bunging? must she be bunging? must we be bunging? must you be bunging? must they be bunging?
Perfect
must I have bunged? must you have bunged? must she have bunged? must we have bunged? must you have bunged? must they have bunged?
V-ing perfect
must I have been bunging? must you have been bunging? must she have been bunging? must we have been bunging? must you have been bunging? must they have been bunging?
Interro-negative form
Simple form
must I not bung? must you not bung? must she not bung? must we not bung? must you not bung? must they not bung?
V-ing form
must I not be bunging? must you not be bunging? must she not be bunging? must we not be bunging? must you not be bunging? must they not be bunging?
Perfect
must I not have bunged? must you not have bunged? must she not have bunged? must we not have bunged? must you not have bunged? must they not have bunged?
V-ing perfect
must I not have been bunging? must you not have been bunging? must she not have been bunging? must we not have been bunging? must you not have been bunging? must they not have been bunging?