I must regiment you must regiment he must regiment we must regiment you must regiment they must regiment
V-ing form
I must be regimenting you must be regimenting he must be regimenting we must be regimenting you must be regimenting they must be regimenting
Perfect
I must have regimented you must have regimented he must have regimented we must have regimented you must have regimented they must have regimented
V-ing perfect
I must have been regimenting you must have been regimenting he must have been regimenting we must have been regimenting you must have been regimenting they must have been regimenting
Negation
Simple form
I must not regiment you must not regiment he must not regiment we must not regiment you must not regiment they must not regiment
V-ing form
I must not be regimenting you must not be regimenting he must not be regimenting we must not be regimenting you must not be regimenting they must not be regimenting
Perfect
I must not have regimented you must not have regimented he must not have regimented we must not have regimented you must not have regimented they must not have regimented
V-ing perfect
I must not have been regimenting you must not have been regimenting he must not have been regimenting we must not have been regimenting you must not have been regimenting they must not have been regimenting
Interrogative form
Simple form
must I regiment? must you regiment? must he regiment? must we regiment? must you regiment? must they regiment?
V-ing form
must I be regimenting? must you be regimenting? must he be regimenting? must we be regimenting? must you be regimenting? must they be regimenting?
Perfect
must I have regimented? must you have regimented? must he have regimented? must we have regimented? must you have regimented? must they have regimented?
V-ing perfect
must I have been regimenting? must you have been regimenting? must he have been regimenting? must we have been regimenting? must you have been regimenting? must they have been regimenting?
Interro-negative form
Simple form
must I not regiment? must you not regiment? must he not regiment? must we not regiment? must you not regiment? must they not regiment?
V-ing form
must I not be regimenting? must you not be regimenting? must he not be regimenting? must we not be regimenting? must you not be regimenting? must they not be regimenting?
Perfect
must I not have regimented? must you not have regimented? must he not have regimented? must we not have regimented? must you not have regimented? must they not have regimented?
V-ing perfect
must I not have been regimenting? must you not have been regimenting? must he not have been regimenting? must we not have been regimenting? must you not have been regimenting? must they not have been regimenting?