I could produce you could produce he could produce we could produce you could produce they could produce
Forma con V-ing
I could be producing you could be producing he could be producing we could be producing you could be producing they could be producing
Perfecto
I could have produced you could have produced he 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 he could have been producing we could have been producing you could have been producing they could have been producing
Negación
Forma simple
I couldn't produce you couldn't produce he couldn't produce we couldn't produce you couldn't produce they couldn't produce
Forma con V-ing
I couldn't be producing you couldn't be producing he couldn't be producing we couldn't be producing you couldn't be producing they couldn't be producing
Perfecto
I couldn't have produced you couldn't have produced he couldn't have produced we couldn't have produced you couldn't have produced they couldn't have produced
Perfecto con V-ing
I couldn't have been producing you couldn't have been producing he couldn't have been producing we couldn't have been producing you couldn't have been producing they couldn't have been producing
Forma interrogativa
Forma simple
could I produce? could you produce? could he produce? could we produce? could you produce? could they produce?
Forma con V-ing
could I be producing? could you be producing? could he be producing? could we be producing? could you be producing? could they be producing?
Perfecto
could I have produced? could you have produced? could he 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 he have been producing? could we have been producing? could you have been producing? could they have been producing?
Forma interro-negativa
Forma simple
couldn't I produce? couldn't you produce? couldn't he produce? couldn't we produce? couldn't you produce? couldn't they produce?
Forma con V-ing
couldn't I be producing? couldn't you be producing? couldn't he be producing? couldn't we be producing? couldn't you be producing? couldn't they be producing?
Perfecto
couldn't I have produced? couldn't you have produced? couldn't he have produced? couldn't we have produced? couldn't you have produced? couldn't they have produced?
Perfecto con V-ing
couldn't I have been producing? couldn't you have been producing? couldn't he have been producing? couldn't we have been producing? couldn't you have been producing? couldn't they have been producing?