must perpetuate
Regular verb: perpetuate - perpetuated- perpetuated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must perpetuate
you must perpetuate
he must perpetuate
we must perpetuate
you must perpetuate
they must perpetuate 	I must be perpetuating
you must be perpetuating
he must be perpetuating
we must be perpetuating
you must be perpetuating
they must be perpetuating	I must have perpetuated
you must have perpetuated
he must have perpetuated
we must have perpetuated
you must have perpetuated
they must have perpetuated	I must have been perpetuating
you must have been perpetuating
he must have been perpetuating
we must have been perpetuating
you must have been perpetuating
they must have been perpetuating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't perpetuate
you mustn't perpetuate
he mustn't perpetuate
we mustn't perpetuate
you mustn't perpetuate
they mustn't perpetuate 	I mustn't be perpetuating
you mustn't be perpetuating
he mustn't be perpetuating
we mustn't be perpetuating
you mustn't be perpetuating
they mustn't be perpetuating	I mustn't have perpetuated
you mustn't have perpetuated
he mustn't have perpetuated
we mustn't have perpetuated
you mustn't have perpetuated
they mustn't have perpetuated	I mustn't have been perpetuating
you mustn't have been perpetuating
he mustn't have been perpetuating
we mustn't have been perpetuating
you mustn't have been perpetuating
they mustn't have been perpetuating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I perpetuate?
must you perpetuate?
must he perpetuate?
must we perpetuate?
must you perpetuate?
must they perpetuate? 	must I be perpetuating?
must you be perpetuating?
must he be perpetuating?
must we be perpetuating?
must you be perpetuating?
must they be perpetuating? 	must I have perpetuated?
must you have perpetuated?
must he have perpetuated?
must we have perpetuated?
must you have perpetuated?
must they have perpetuated? 	must I have been perpetuating?
must you have been perpetuating?
must he have been perpetuating?
must we have been perpetuating?
must you have been perpetuating?
must they have been perpetuating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I perpetuate?
mustn't you perpetuate?
mustn't he perpetuate?
mustn't we perpetuate?
mustn't you perpetuate?
mustn't they perpetuate? 	mustn't I be perpetuating?
mustn't you be perpetuating?
mustn't he be perpetuating?
mustn't we be perpetuating?
mustn't you be perpetuating?
mustn't they be perpetuating? 	mustn't I have perpetuated?
mustn't you have perpetuated?
mustn't he have perpetuated?
mustn't we have perpetuated?
mustn't you have perpetuated?
mustn't they have perpetuated? 	mustn't I have been perpetuating?
mustn't you have been perpetuating?
mustn't he have been perpetuating?
mustn't we have been perpetuating?
mustn't you have been perpetuating?
mustn't they have been perpetuating?