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