I could isle you could isle he could isle we could isle you could isle they could isle
Forma con V-ing
I could be isling you could be isling he could be isling we could be isling you could be isling they could be isling
Perfecto
I could have isled you could have isled he could have isled we could have isled you could have isled they could have isled
Perfecto con V-ing
I could have been isling you could have been isling he could have been isling we could have been isling you could have been isling they could have been isling
Negación
Forma simple
I could not isle you could not isle he could not isle we could not isle you could not isle they could not isle
Forma con V-ing
I could not be isling you could not be isling he could not be isling we could not be isling you could not be isling they could not be isling
Perfecto
I could not have isled you could not have isled he could not have isled we could not have isled you could not have isled they could not have isled
Perfecto con V-ing
I could not have been isling you could not have been isling he could not have been isling we could not have been isling you could not have been isling they could not have been isling
Forma interrogativa
Forma simple
could I isle? could you isle? could he isle? could we isle? could you isle? could they isle?
Forma con V-ing
could I be isling? could you be isling? could he be isling? could we be isling? could you be isling? could they be isling?
Perfecto
could I have isled? could you have isled? could he have isled? could we have isled? could you have isled? could they have isled?
Perfecto con V-ing
could I have been isling? could you have been isling? could he have been isling? could we have been isling? could you have been isling? could they have been isling?
Forma interro-negativa
Forma simple
could I not isle? could you not isle? could he not isle? could we not isle? could you not isle? could they not isle?
Forma con V-ing
could I not be isling? could you not be isling? could he not be isling? could we not be isling? could you not be isling? could they not be isling?
Perfecto
could I not have isled? could you not have isled? could he not have isled? could we not have isled? could you not have isled? could they not have isled?
Perfecto con V-ing
could I not have been isling? could you not have been isling? could he not have been isling? could we not have been isling? could you not have been isling? could they not have been isling?