I could sew you could sew he could sew we could sew you could sew they could sew
Forma con V-ing
I could be sewing you could be sewing he could be sewing we could be sewing you could be sewing they could be sewing
Perfecto
I could have sewn you could have sewn he could have sewn we could have sewn you could have sewn they could have sewn
Perfecto con V-ing
I could have been sewing you could have been sewing he could have been sewing we could have been sewing you could have been sewing they could have been sewing
Negación
Forma simple
I could not sew you could not sew he could not sew we could not sew you could not sew they could not sew
Forma con V-ing
I could not be sewing you could not be sewing he could not be sewing we could not be sewing you could not be sewing they could not be sewing
Perfecto
I could not have sewn you could not have sewn he could not have sewn we could not have sewn you could not have sewn they could not have sewn
Perfecto con V-ing
I could not have been sewing you could not have been sewing he could not have been sewing we could not have been sewing you could not have been sewing they could not have been sewing
Forma interrogativa
Forma simple
could I sew? could you sew? could he sew? could we sew? could you sew? could they sew?
Forma con V-ing
could I be sewing? could you be sewing? could he be sewing? could we be sewing? could you be sewing? could they be sewing?
Perfecto
could I have sewn? could you have sewn? could he have sewn? could we have sewn? could you have sewn? could they have sewn?
Perfecto con V-ing
could I have been sewing? could you have been sewing? could he have been sewing? could we have been sewing? could you have been sewing? could they have been sewing?
Forma interro-negativa
Forma simple
could I not sew? could you not sew? could he not sew? could we not sew? could you not sew? could they not sew?
Forma con V-ing
could I not be sewing? could you not be sewing? could he not be sewing? could we not be sewing? could you not be sewing? could they not be sewing?
Perfecto
could I not have sewn? could you not have sewn? could he not have sewn? could we not have sewn? could you not have sewn? could they not have sewn?
Perfecto con V-ing
could I not have been sewing? could you not have been sewing? could he not have been sewing? could we not have been sewing? could you not have been sewing? could they not have been sewing?