I could sew you could sew she could sew we could sew you could sew they could sew
Forma con V-ing
I could be sewing you could be sewing she could be sewing we could be sewing you could be sewing they could be sewing
Perfecto
I could have sewn you could have sewn she 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 she could have been sewing we could have been sewing you could have been sewing they could have been sewing
Negación
Forma simple
I couldn't sew you couldn't sew she couldn't sew we couldn't sew you couldn't sew they couldn't sew
Forma con V-ing
I couldn't be sewing you couldn't be sewing she couldn't be sewing we couldn't be sewing you couldn't be sewing they couldn't be sewing
Perfecto
I couldn't have sewn you couldn't have sewn she couldn't have sewn we couldn't have sewn you couldn't have sewn they couldn't have sewn
Perfecto con V-ing
I couldn't have been sewing you couldn't have been sewing she couldn't have been sewing we couldn't have been sewing you couldn't have been sewing they couldn't have been sewing
Forma interrogativa
Forma simple
could I sew? could you sew? could she sew? could we sew? could you sew? could they sew?
Forma con V-ing
could I be sewing? could you be sewing? could she be sewing? could we be sewing? could you be sewing? could they be sewing?
Perfecto
could I have sewn? could you have sewn? could she 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 she have been sewing? could we have been sewing? could you have been sewing? could they have been sewing?
Forma interro-negativa
Forma simple
couldn't I sew? couldn't you sew? couldn't she sew? couldn't we sew? couldn't you sew? couldn't they sew?
Forma con V-ing
couldn't I be sewing? couldn't you be sewing? couldn't she be sewing? couldn't we be sewing? couldn't you be sewing? couldn't they be sewing?
Perfecto
couldn't I have sewn? couldn't you have sewn? couldn't she have sewn? couldn't we have sewn? couldn't you have sewn? couldn't they have sewn?
Perfecto con V-ing
couldn't I have been sewing? couldn't you have been sewing? couldn't she have been sewing? couldn't we have been sewing? couldn't you have been sewing? couldn't they have been sewing?