must rock
Regular verb: rock - rocked- rocked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must rock
you must rock
he must rock
we must rock
you must rock
they must rock 	I must be rocking
you must be rocking
he must be rocking
we must be rocking
you must be rocking
they must be rocking	I must have rocked
you must have rocked
he must have rocked
we must have rocked
you must have rocked
they must have rocked	I must have been rocking
you must have been rocking
he must have been rocking
we must have been rocking
you must have been rocking
they must have been rocking	

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

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