I could refrain you could refrain he could refrain we could refrain you could refrain they could refrain
Forma con V-ing
I could be refraining you could be refraining he could be refraining we could be refraining you could be refraining they could be refraining
Perfecto
I could have refrained you could have refrained he could have refrained we could have refrained you could have refrained they could have refrained
Perfecto con V-ing
I could have been refraining you could have been refraining he could have been refraining we could have been refraining you could have been refraining they could have been refraining
Negación
Forma simple
I could not refrain you could not refrain he could not refrain we could not refrain you could not refrain they could not refrain
Forma con V-ing
I could not be refraining you could not be refraining he could not be refraining we could not be refraining you could not be refraining they could not be refraining
Perfecto
I could not have refrained you could not have refrained he could not have refrained we could not have refrained you could not have refrained they could not have refrained
Perfecto con V-ing
I could not have been refraining you could not have been refraining he could not have been refraining we could not have been refraining you could not have been refraining they could not have been refraining
Forma interrogativa
Forma simple
could I refrain? could you refrain? could he refrain? could we refrain? could you refrain? could they refrain?
Forma con V-ing
could I be refraining? could you be refraining? could he be refraining? could we be refraining? could you be refraining? could they be refraining?
Perfecto
could I have refrained? could you have refrained? could he have refrained? could we have refrained? could you have refrained? could they have refrained?
Perfecto con V-ing
could I have been refraining? could you have been refraining? could he have been refraining? could we have been refraining? could you have been refraining? could they have been refraining?
Forma interro-negativa
Forma simple
could I not refrain? could you not refrain? could he not refrain? could we not refrain? could you not refrain? could they not refrain?
Forma con V-ing
could I not be refraining? could you not be refraining? could he not be refraining? could we not be refraining? could you not be refraining? could they not be refraining?
Perfecto
could I not have refrained? could you not have refrained? could he not have refrained? could we not have refrained? could you not have refrained? could they not have refrained?
Perfecto con V-ing
could I not have been refraining? could you not have been refraining? could he not have been refraining? could we not have been refraining? could you not have been refraining? could they not have been refraining?