I could oil you could oil he could oil we could oil you could oil they could oil
Forma con V-ing
I could be oiling you could be oiling he could be oiling we could be oiling you could be oiling they could be oiling
Perfecto
I could have oiled you could have oiled he could have oiled we could have oiled you could have oiled they could have oiled
Perfecto con V-ing
I could have been oiling you could have been oiling he could have been oiling we could have been oiling you could have been oiling they could have been oiling
Negación
Forma simple
I could not oil you could not oil he could not oil we could not oil you could not oil they could not oil
Forma con V-ing
I could not be oiling you could not be oiling he could not be oiling we could not be oiling you could not be oiling they could not be oiling
Perfecto
I could not have oiled you could not have oiled he could not have oiled we could not have oiled you could not have oiled they could not have oiled
Perfecto con V-ing
I could not have been oiling you could not have been oiling he could not have been oiling we could not have been oiling you could not have been oiling they could not have been oiling
Forma interrogativa
Forma simple
could I oil? could you oil? could he oil? could we oil? could you oil? could they oil?
Forma con V-ing
could I be oiling? could you be oiling? could he be oiling? could we be oiling? could you be oiling? could they be oiling?
Perfecto
could I have oiled? could you have oiled? could he have oiled? could we have oiled? could you have oiled? could they have oiled?
Perfecto con V-ing
could I have been oiling? could you have been oiling? could he have been oiling? could we have been oiling? could you have been oiling? could they have been oiling?
Forma interro-negativa
Forma simple
could I not oil? could you not oil? could he not oil? could we not oil? could you not oil? could they not oil?
Forma con V-ing
could I not be oiling? could you not be oiling? could he not be oiling? could we not be oiling? could you not be oiling? could they not be oiling?
Perfecto
could I not have oiled? could you not have oiled? could he not have oiled? could we not have oiled? could you not have oiled? could they not have oiled?
Perfecto con V-ing
could I not have been oiling? could you not have been oiling? could he not have been oiling? could we not have been oiling? could you not have been oiling? could they not have been oiling?