I could toil you could toil he could toil we could toil you could toil they could toil
Forma con V-ing
I could be toiling you could be toiling he could be toiling we could be toiling you could be toiling they could be toiling
Perfecto
I could have toiled you could have toiled he could have toiled we could have toiled you could have toiled they could have toiled
Perfecto con V-ing
I could have been toiling you could have been toiling he could have been toiling we could have been toiling you could have been toiling they could have been toiling
Negación
Forma simple
I could not toil you could not toil he could not toil we could not toil you could not toil they could not toil
Forma con V-ing
I could not be toiling you could not be toiling he could not be toiling we could not be toiling you could not be toiling they could not be toiling
Perfecto
I could not have toiled you could not have toiled he could not have toiled we could not have toiled you could not have toiled they could not have toiled
Perfecto con V-ing
I could not have been toiling you could not have been toiling he could not have been toiling we could not have been toiling you could not have been toiling they could not have been toiling
Forma interrogativa
Forma simple
could I toil? could you toil? could he toil? could we toil? could you toil? could they toil?
Forma con V-ing
could I be toiling? could you be toiling? could he be toiling? could we be toiling? could you be toiling? could they be toiling?
Perfecto
could I have toiled? could you have toiled? could he have toiled? could we have toiled? could you have toiled? could they have toiled?
Perfecto con V-ing
could I have been toiling? could you have been toiling? could he have been toiling? could we have been toiling? could you have been toiling? could they have been toiling?
Forma interro-negativa
Forma simple
could I not toil? could you not toil? could he not toil? could we not toil? could you not toil? could they not toil?
Forma con V-ing
could I not be toiling? could you not be toiling? could he not be toiling? could we not be toiling? could you not be toiling? could they not be toiling?
Perfecto
could I not have toiled? could you not have toiled? could he not have toiled? could we not have toiled? could you not have toiled? could they not have toiled?
Perfecto con V-ing
could I not have been toiling? could you not have been toiling? could he not have been toiling? could we not have been toiling? could you not have been toiling? could they not have been toiling?