I could produce you could produce she could produce we could produce you could produce they could produce
Forma con V-ing
I could be producing you could be producing she could be producing we could be producing you could be producing they could be producing
Perfecto
I could have produced you could have produced she could have produced we could have produced you could have produced they could have produced
Perfecto con V-ing
I could have been producing you could have been producing she could have been producing we could have been producing you could have been producing they could have been producing
Negación
Forma simple
I could not produce you could not produce she could not produce we could not produce you could not produce they could not produce
Forma con V-ing
I could not be producing you could not be producing she could not be producing we could not be producing you could not be producing they could not be producing
Perfecto
I could not have produced you could not have produced she could not have produced we could not have produced you could not have produced they could not have produced
Perfecto con V-ing
I could not have been producing you could not have been producing she could not have been producing we could not have been producing you could not have been producing they could not have been producing
Forma interrogativa
Forma simple
could I produce? could you produce? could she produce? could we produce? could you produce? could they produce?
Forma con V-ing
could I be producing? could you be producing? could she be producing? could we be producing? could you be producing? could they be producing?
Perfecto
could I have produced? could you have produced? could she have produced? could we have produced? could you have produced? could they have produced?
Perfecto con V-ing
could I have been producing? could you have been producing? could she have been producing? could we have been producing? could you have been producing? could they have been producing?
Forma interro-negativa
Forma simple
could I not produce? could you not produce? could she not produce? could we not produce? could you not produce? could they not produce?
Forma con V-ing
could I not be producing? could you not be producing? could she not be producing? could we not be producing? could you not be producing? could they not be producing?
Perfecto
could I not have produced? could you not have produced? could she not have produced? could we not have produced? could you not have produced? could they not have produced?
Perfecto con V-ing
could I not have been producing? could you not have been producing? could she not have been producing? could we not have been producing? could you not have been producing? could they not have been producing?