I must roll you must roll she must roll we must roll you must roll they must roll
V-ing form
I must be rolling you must be rolling she must be rolling we must be rolling you must be rolling they must be rolling
Perfect
I must have rolled you must have rolled she must have rolled we must have rolled you must have rolled they must have rolled
V-ing perfect
I must have been rolling you must have been rolling she must have been rolling we must have been rolling you must have been rolling they must have been rolling
Negation
Simple form
I mustn't roll you mustn't roll she mustn't roll we mustn't roll you mustn't roll they mustn't roll
V-ing form
I mustn't be rolling you mustn't be rolling she mustn't be rolling we mustn't be rolling you mustn't be rolling they mustn't be rolling
Perfect
I mustn't have rolled you mustn't have rolled she mustn't have rolled we mustn't have rolled you mustn't have rolled they mustn't have rolled
V-ing perfect
I mustn't have been rolling you mustn't have been rolling she mustn't have been rolling we mustn't have been rolling you mustn't have been rolling they mustn't have been rolling
Interrogative form
Simple form
must I roll? must you roll? must she roll? must we roll? must you roll? must they roll?
V-ing form
must I be rolling? must you be rolling? must she be rolling? must we be rolling? must you be rolling? must they be rolling?
Perfect
must I have rolled? must you have rolled? must she have rolled? must we have rolled? must you have rolled? must they have rolled?
V-ing perfect
must I have been rolling? must you have been rolling? must she have been rolling? must we have been rolling? must you have been rolling? must they have been rolling?
Interro-negative form
Simple form
mustn't I roll? mustn't you roll? mustn't she roll? mustn't we roll? mustn't you roll? mustn't they roll?
V-ing form
mustn't I be rolling? mustn't you be rolling? mustn't she be rolling? mustn't we be rolling? mustn't you be rolling? mustn't they be rolling?
Perfect
mustn't I have rolled? mustn't you have rolled? mustn't she have rolled? mustn't we have rolled? mustn't you have rolled? mustn't they have rolled?
V-ing perfect
mustn't I have been rolling? mustn't you have been rolling? mustn't she have been rolling? mustn't we have been rolling? mustn't you have been rolling? mustn't they have been rolling?