I could tin you could tin she could tin we could tin you could tin they could tin
Forma con V-ing
I could be tinning you could be tinning she could be tinning we could be tinning you could be tinning they could be tinning
Perfecto
I could have tinned you could have tinned she could have tinned we could have tinned you could have tinned they could have tinned
Perfecto con V-ing
I could have been tinning you could have been tinning she could have been tinning we could have been tinning you could have been tinning they could have been tinning
Negación
Forma simple
I could not tin you could not tin she could not tin we could not tin you could not tin they could not tin
Forma con V-ing
I could not be tinning you could not be tinning she could not be tinning we could not be tinning you could not be tinning they could not be tinning
Perfecto
I could not have tinned you could not have tinned she could not have tinned we could not have tinned you could not have tinned they could not have tinned
Perfecto con V-ing
I could not have been tinning you could not have been tinning she could not have been tinning we could not have been tinning you could not have been tinning they could not have been tinning
Forma interrogativa
Forma simple
could I tin? could you tin? could she tin? could we tin? could you tin? could they tin?
Forma con V-ing
could I be tinning? could you be tinning? could she be tinning? could we be tinning? could you be tinning? could they be tinning?
Perfecto
could I have tinned? could you have tinned? could she have tinned? could we have tinned? could you have tinned? could they have tinned?
Perfecto con V-ing
could I have been tinning? could you have been tinning? could she have been tinning? could we have been tinning? could you have been tinning? could they have been tinning?
Forma interro-negativa
Forma simple
could I not tin? could you not tin? could she not tin? could we not tin? could you not tin? could they not tin?
Forma con V-ing
could I not be tinning? could you not be tinning? could she not be tinning? could we not be tinning? could you not be tinning? could they not be tinning?
Perfecto
could I not have tinned? could you not have tinned? could she not have tinned? could we not have tinned? could you not have tinned? could they not have tinned?
Perfecto con V-ing
could I not have been tinning? could you not have been tinning? could she not have been tinning? could we not have been tinning? could you not have been tinning? could they not have been tinning?