I could trot you could trot he could trot we could trot you could trot they could trot
Forma con V-ing
I could be trotting you could be trotting he could be trotting we could be trotting you could be trotting they could be trotting
Perfecto
I could have trotted you could have trotted he could have trotted we could have trotted you could have trotted they could have trotted
Perfecto con V-ing
I could have been trotting you could have been trotting he could have been trotting we could have been trotting you could have been trotting they could have been trotting
Negación
Forma simple
I could not trot you could not trot he could not trot we could not trot you could not trot they could not trot
Forma con V-ing
I could not be trotting you could not be trotting he could not be trotting we could not be trotting you could not be trotting they could not be trotting
Perfecto
I could not have trotted you could not have trotted he could not have trotted we could not have trotted you could not have trotted they could not have trotted
Perfecto con V-ing
I could not have been trotting you could not have been trotting he could not have been trotting we could not have been trotting you could not have been trotting they could not have been trotting
Forma interrogativa
Forma simple
could I trot? could you trot? could he trot? could we trot? could you trot? could they trot?
Forma con V-ing
could I be trotting? could you be trotting? could he be trotting? could we be trotting? could you be trotting? could they be trotting?
Perfecto
could I have trotted? could you have trotted? could he have trotted? could we have trotted? could you have trotted? could they have trotted?
Perfecto con V-ing
could I have been trotting? could you have been trotting? could he have been trotting? could we have been trotting? could you have been trotting? could they have been trotting?
Forma interro-negativa
Forma simple
could I not trot? could you not trot? could he not trot? could we not trot? could you not trot? could they not trot?
Forma con V-ing
could I not be trotting? could you not be trotting? could he not be trotting? could we not be trotting? could you not be trotting? could they not be trotting?
Perfecto
could I not have trotted? could you not have trotted? could he not have trotted? could we not have trotted? could you not have trotted? could they not have trotted?
Perfecto con V-ing
could I not have been trotting? could you not have been trotting? could he not have been trotting? could we not have been trotting? could you not have been trotting? could they not have been trotting?