I could coproduce you could coproduce he could coproduce we could coproduce you could coproduce they could coproduce
V-ing form
I could be coproducing you could be coproducing he could be coproducing we could be coproducing you could be coproducing they could be coproducing
Perfect
I could have coproduced you could have coproduced he could have coproduced we could have coproduced you could have coproduced they could have coproduced
V-ing perfect
I could have been coproducing you could have been coproducing he could have been coproducing we could have been coproducing you could have been coproducing they could have been coproducing
Negation
Simple form
I could not coproduce you could not coproduce he could not coproduce we could not coproduce you could not coproduce they could not coproduce
V-ing form
I could not be coproducing you could not be coproducing he could not be coproducing we could not be coproducing you could not be coproducing they could not be coproducing
Perfect
I could not have coproduced you could not have coproduced he could not have coproduced we could not have coproduced you could not have coproduced they could not have coproduced
V-ing perfect
I could not have been coproducing you could not have been coproducing he could not have been coproducing we could not have been coproducing you could not have been coproducing they could not have been coproducing
Interrogative form
Simple form
could I coproduce? could you coproduce? could he coproduce? could we coproduce? could you coproduce? could they coproduce?
V-ing form
could I be coproducing? could you be coproducing? could he be coproducing? could we be coproducing? could you be coproducing? could they be coproducing?
Perfect
could I have coproduced? could you have coproduced? could he have coproduced? could we have coproduced? could you have coproduced? could they have coproduced?
V-ing perfect
could I have been coproducing? could you have been coproducing? could he have been coproducing? could we have been coproducing? could you have been coproducing? could they have been coproducing?
Interro-negative form
Simple form
could I not coproduce? could you not coproduce? could he not coproduce? could we not coproduce? could you not coproduce? could they not coproduce?
V-ing form
could I not be coproducing? could you not be coproducing? could he not be coproducing? could we not be coproducing? could you not be coproducing? could they not be coproducing?
Perfect
could I not have coproduced? could you not have coproduced? could he not have coproduced? could we not have coproduced? could you not have coproduced? could they not have coproduced?
V-ing perfect
could I not have been coproducing? could you not have been coproducing? could he not have been coproducing? could we not have been coproducing? could you not have been coproducing? could they not have been coproducing?