must rock
Regular verb: rock - rocked- rocked

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