English verb conjugation
COULD MASS-PRODUCE

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

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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