must mass-produce
Regular verb: mass-produce - mass-produced- mass-produced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must mass-produce
you must mass-produce
he must mass-produce
we must mass-produce
you must mass-produce
they must mass-produce 	I must be mass-producing
you must be mass-producing
he must be mass-producing
we must be mass-producing
you must be mass-producing
they must be mass-producing	I must have mass-produced
you must have mass-produced
he must have mass-produced
we must have mass-produced
you must have mass-produced
they must have mass-produced	I must have been mass-producing
you must have been mass-producing
he must have been mass-producing
we must have been mass-producing
you must have been mass-producing
they must have been mass-producing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not mass-produce
you must not mass-produce
he must not mass-produce
we must not mass-produce
you must not mass-produce
they must not mass-produce 	I must not be mass-producing
you must not be mass-producing
he must not be mass-producing
we must not be mass-producing
you must not be mass-producing
they must not be mass-producing	I must not have mass-produced
you must not have mass-produced
he must not have mass-produced
we must not have mass-produced
you must not have mass-produced
they must not have mass-produced	I must not have been mass-producing
you must not have been mass-producing
he must not have been mass-producing
we must not have been mass-producing
you must not have been mass-producing
they must not have been mass-producing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I mass-produce?
must you mass-produce?
must he mass-produce?
must we mass-produce?
must you mass-produce?
must they mass-produce? 	must I be mass-producing?
must you be mass-producing?
must he be mass-producing?
must we be mass-producing?
must you be mass-producing?
must they be mass-producing? 	must I have mass-produced?
must you have mass-produced?
must he have mass-produced?
must we have mass-produced?
must you have mass-produced?
must they have mass-produced? 	must I have been mass-producing?
must you have been mass-producing?
must he have been mass-producing?
must we have been mass-producing?
must you have been mass-producing?
must they have been mass-producing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not mass-produce?
must you not mass-produce?
must he not mass-produce?
must we not mass-produce?
must you not mass-produce?
must they not mass-produce? 	must I not be mass-producing?
must you not be mass-producing?
must he not be mass-producing?
must we not be mass-producing?
must you not be mass-producing?
must they not be mass-producing? 	must I not have mass-produced?
must you not have mass-produced?
must he not have mass-produced?
must we not have mass-produced?
must you not have mass-produced?
must they not have mass-produced? 	must I not have been mass-producing?
must you not have been mass-producing?
must he not have been mass-producing?
must we not have been mass-producing?
must you not have been mass-producing?
must they not have been mass-producing?