must prefabricate
Regular verb: prefabricate - prefabricated- prefabricated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must prefabricate
you must prefabricate
he must prefabricate
we must prefabricate
you must prefabricate
they must prefabricate 	I must be prefabricating
you must be prefabricating
he must be prefabricating
we must be prefabricating
you must be prefabricating
they must be prefabricating	I must have prefabricated
you must have prefabricated
he must have prefabricated
we must have prefabricated
you must have prefabricated
they must have prefabricated	I must have been prefabricating
you must have been prefabricating
he must have been prefabricating
we must have been prefabricating
you must have been prefabricating
they must have been prefabricating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't prefabricate
you mustn't prefabricate
he mustn't prefabricate
we mustn't prefabricate
you mustn't prefabricate
they mustn't prefabricate 	I mustn't be prefabricating
you mustn't be prefabricating
he mustn't be prefabricating
we mustn't be prefabricating
you mustn't be prefabricating
they mustn't be prefabricating	I mustn't have prefabricated
you mustn't have prefabricated
he mustn't have prefabricated
we mustn't have prefabricated
you mustn't have prefabricated
they mustn't have prefabricated	I mustn't have been prefabricating
you mustn't have been prefabricating
he mustn't have been prefabricating
we mustn't have been prefabricating
you mustn't have been prefabricating
they mustn't have been prefabricating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I prefabricate?
must you prefabricate?
must he prefabricate?
must we prefabricate?
must you prefabricate?
must they prefabricate? 	must I be prefabricating?
must you be prefabricating?
must he be prefabricating?
must we be prefabricating?
must you be prefabricating?
must they be prefabricating? 	must I have prefabricated?
must you have prefabricated?
must he have prefabricated?
must we have prefabricated?
must you have prefabricated?
must they have prefabricated? 	must I have been prefabricating?
must you have been prefabricating?
must he have been prefabricating?
must we have been prefabricating?
must you have been prefabricating?
must they have been prefabricating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I prefabricate?
mustn't you prefabricate?
mustn't he prefabricate?
mustn't we prefabricate?
mustn't you prefabricate?
mustn't they prefabricate? 	mustn't I be prefabricating?
mustn't you be prefabricating?
mustn't he be prefabricating?
mustn't we be prefabricating?
mustn't you be prefabricating?
mustn't they be prefabricating? 	mustn't I have prefabricated?
mustn't you have prefabricated?
mustn't he have prefabricated?
mustn't we have prefabricated?
mustn't you have prefabricated?
mustn't they have prefabricated? 	mustn't I have been prefabricating?
mustn't you have been prefabricating?
mustn't he have been prefabricating?
mustn't we have been prefabricating?
mustn't you have been prefabricating?
mustn't they have been prefabricating?