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 must not rock you must not rock she must not rock we must not rock you must not rock they must not rock
V-ing form
I must not be rocking you must not be rocking she must not be rocking we must not be rocking you must not be rocking they must not be rocking
Perfect
I must not have rocked you must not have rocked she must not have rocked we must not have rocked you must not have rocked they must not have rocked
V-ing perfect
I must not have been rocking you must not have been rocking she must not have been rocking we must not have been rocking you must not have been rocking they must not 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
must I not rock? must you not rock? must she not rock? must we not rock? must you not rock? must they not rock?
V-ing form
must I not be rocking? must you not be rocking? must she not be rocking? must we not be rocking? must you not be rocking? must they not be rocking?
Perfect
must I not have rocked? must you not have rocked? must she not have rocked? must we not have rocked? must you not have rocked? must they not have rocked?
V-ing perfect
must I not have been rocking? must you not have been rocking? must she not have been rocking? must we not have been rocking? must you not have been rocking? must they not have been rocking?