I could regain you could regain he could regain we could regain you could regain they could regain
Forma com V-ing
I could be regaining you could be regaining he could be regaining we could be regaining you could be regaining they could be regaining
Perfeito
I could have regained you could have regained he could have regained we could have regained you could have regained they could have regained
Perfeito com V-ing
I could have been regaining you could have been regaining he could have been regaining we could have been regaining you could have been regaining they could have been regaining
Negação
Forma simple
I could not regain you could not regain he could not regain we could not regain you could not regain they could not regain
Forma com V-ing
I could not be regaining you could not be regaining he could not be regaining we could not be regaining you could not be regaining they could not be regaining
Perfeito
I could not have regained you could not have regained he could not have regained we could not have regained you could not have regained they could not have regained
Perfeito com V-ing
I could not have been regaining you could not have been regaining he could not have been regaining we could not have been regaining you could not have been regaining they could not have been regaining
Forma interrogativa
Forma simple
could I regain? could you regain? could he regain? could we regain? could you regain? could they regain?
Forma com V-ing
could I be regaining? could you be regaining? could he be regaining? could we be regaining? could you be regaining? could they be regaining?
Perfeito
could I have regained? could you have regained? could he have regained? could we have regained? could you have regained? could they have regained?
Perfeito com V-ing
could I have been regaining? could you have been regaining? could he have been regaining? could we have been regaining? could you have been regaining? could they have been regaining?
Forma interro-Negação
Forma simple
could I not regain? could you not regain? could he not regain? could we not regain? could you not regain? could they not regain?
Forma com V-ing
could I not be regaining? could you not be regaining? could he not be regaining? could we not be regaining? could you not be regaining? could they not be regaining?
Perfeito
could I not have regained? could you not have regained? could he not have regained? could we not have regained? could you not have regained? could they not have regained?
Perfeito com V-ing
could I not have been regaining? could you not have been regaining? could he not have been regaining? could we not have been regaining? could you not have been regaining? could they not have been regaining?