I must slum you must slum she must slum we must slum you must slum they must slum
V-ing form
I must be sluming you must be sluming she must be sluming we must be sluming you must be sluming they must be sluming
Perfect
I must have slumed you must have slumed she must have slumed we must have slumed you must have slumed they must have slumed
V-ing perfect
I must have been sluming you must have been sluming she must have been sluming we must have been sluming you must have been sluming they must have been sluming
Negation
Simple form
I must not slum you must not slum she must not slum we must not slum you must not slum they must not slum
V-ing form
I must not be sluming you must not be sluming she must not be sluming we must not be sluming you must not be sluming they must not be sluming
Perfect
I must not have slumed you must not have slumed she must not have slumed we must not have slumed you must not have slumed they must not have slumed
V-ing perfect
I must not have been sluming you must not have been sluming she must not have been sluming we must not have been sluming you must not have been sluming they must not have been sluming
Interrogative form
Simple form
must I slum? must you slum? must she slum? must we slum? must you slum? must they slum?
V-ing form
must I be sluming? must you be sluming? must she be sluming? must we be sluming? must you be sluming? must they be sluming?
Perfect
must I have slumed? must you have slumed? must she have slumed? must we have slumed? must you have slumed? must they have slumed?
V-ing perfect
must I have been sluming? must you have been sluming? must she have been sluming? must we have been sluming? must you have been sluming? must they have been sluming?
Interro-negative form
Simple form
must I not slum? must you not slum? must she not slum? must we not slum? must you not slum? must they not slum?
V-ing form
must I not be sluming? must you not be sluming? must she not be sluming? must we not be sluming? must you not be sluming? must they not be sluming?
Perfect
must I not have slumed? must you not have slumed? must she not have slumed? must we not have slumed? must you not have slumed? must they not have slumed?
V-ing perfect
must I not have been sluming? must you not have been sluming? must she not have been sluming? must we not have been sluming? must you not have been sluming? must they not have been sluming?