must prorate
Regular verb: prorate - prorated- prorated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prorate
you must prorate
he must prorate
we must prorate
you must prorate
they must prorate 	I must be prorating
you must be prorating
he must be prorating
we must be prorating
you must be prorating
they must be prorating	I must have prorated
you must have prorated
he must have prorated
we must have prorated
you must have prorated
they must have prorated	I must have been prorating
you must have been prorating
he must have been prorating
we must have been prorating
you must have been prorating
they must have been prorating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prorate
you mustn't prorate
he mustn't prorate
we mustn't prorate
you mustn't prorate
they mustn't prorate 	I mustn't be prorating
you mustn't be prorating
he mustn't be prorating
we mustn't be prorating
you mustn't be prorating
they mustn't be prorating	I mustn't have prorated
you mustn't have prorated
he mustn't have prorated
we mustn't have prorated
you mustn't have prorated
they mustn't have prorated	I mustn't have been prorating
you mustn't have been prorating
he mustn't have been prorating
we mustn't have been prorating
you mustn't have been prorating
they mustn't have been prorating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prorate?
must you prorate?
must he prorate?
must we prorate?
must you prorate?
must they prorate? 	must I be prorating?
must you be prorating?
must he be prorating?
must we be prorating?
must you be prorating?
must they be prorating? 	must I have prorated?
must you have prorated?
must he have prorated?
must we have prorated?
must you have prorated?
must they have prorated? 	must I have been prorating?
must you have been prorating?
must he have been prorating?
must we have been prorating?
must you have been prorating?
must they have been prorating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prorate?
mustn't you prorate?
mustn't he prorate?
mustn't we prorate?
mustn't you prorate?
mustn't they prorate? 	mustn't I be prorating?
mustn't you be prorating?
mustn't he be prorating?
mustn't we be prorating?
mustn't you be prorating?
mustn't they be prorating? 	mustn't I have prorated?
mustn't you have prorated?
mustn't he have prorated?
mustn't we have prorated?
mustn't you have prorated?
mustn't they have prorated? 	mustn't I have been prorating?
mustn't you have been prorating?
mustn't he have been prorating?
mustn't we have been prorating?
mustn't you have been prorating?
mustn't they have been prorating?