I could remain you could remain he could remain we could remain you could remain they could remain
Forma con V-ing
I could be remaining you could be remaining he could be remaining we could be remaining you could be remaining they could be remaining
Perfecto
I could have remained you could have remained he could have remained we could have remained you could have remained they could have remained
Perfecto con V-ing
I could have been remaining you could have been remaining he could have been remaining we could have been remaining you could have been remaining they could have been remaining
Negación
Forma simple
I could not remain you could not remain he could not remain we could not remain you could not remain they could not remain
Forma con V-ing
I could not be remaining you could not be remaining he could not be remaining we could not be remaining you could not be remaining they could not be remaining
Perfecto
I could not have remained you could not have remained he could not have remained we could not have remained you could not have remained they could not have remained
Perfecto con V-ing
I could not have been remaining you could not have been remaining he could not have been remaining we could not have been remaining you could not have been remaining they could not have been remaining
Forma interrogativa
Forma simple
could I remain? could you remain? could he remain? could we remain? could you remain? could they remain?
Forma con V-ing
could I be remaining? could you be remaining? could he be remaining? could we be remaining? could you be remaining? could they be remaining?
Perfecto
could I have remained? could you have remained? could he have remained? could we have remained? could you have remained? could they have remained?
Perfecto con V-ing
could I have been remaining? could you have been remaining? could he have been remaining? could we have been remaining? could you have been remaining? could they have been remaining?
Forma interro-negativa
Forma simple
could I not remain? could you not remain? could he not remain? could we not remain? could you not remain? could they not remain?
Forma con V-ing
could I not be remaining? could you not be remaining? could he not be remaining? could we not be remaining? could you not be remaining? could they not be remaining?
Perfecto
could I not have remained? could you not have remained? could he not have remained? could we not have remained? could you not have remained? could they not have remained?
Perfecto con V-ing
could I not have been remaining? could you not have been remaining? could he not have been remaining? could we not have been remaining? could you not have been remaining? could they not have been remaining?