I could curd you could curd he could curd we could curd you could curd they could curd
Forma con V-ing
I could be curding you could be curding he could be curding we could be curding you could be curding they could be curding
Perfecto
I could have curded you could have curded he could have curded we could have curded you could have curded they could have curded
Perfecto con V-ing
I could have been curding you could have been curding he could have been curding we could have been curding you could have been curding they could have been curding
Negación
Forma simple
I could not curd you could not curd he could not curd we could not curd you could not curd they could not curd
Forma con V-ing
I could not be curding you could not be curding he could not be curding we could not be curding you could not be curding they could not be curding
Perfecto
I could not have curded you could not have curded he could not have curded we could not have curded you could not have curded they could not have curded
Perfecto con V-ing
I could not have been curding you could not have been curding he could not have been curding we could not have been curding you could not have been curding they could not have been curding
Forma interrogativa
Forma simple
could I curd? could you curd? could he curd? could we curd? could you curd? could they curd?
Forma con V-ing
could I be curding? could you be curding? could he be curding? could we be curding? could you be curding? could they be curding?
Perfecto
could I have curded? could you have curded? could he have curded? could we have curded? could you have curded? could they have curded?
Perfecto con V-ing
could I have been curding? could you have been curding? could he have been curding? could we have been curding? could you have been curding? could they have been curding?
Forma interro-negativa
Forma simple
could I not curd? could you not curd? could he not curd? could we not curd? could you not curd? could they not curd?
Forma con V-ing
could I not be curding? could you not be curding? could he not be curding? could we not be curding? could you not be curding? could they not be curding?
Perfecto
could I not have curded? could you not have curded? could he not have curded? could we not have curded? could you not have curded? could they not have curded?
Perfecto con V-ing
could I not have been curding? could you not have been curding? could he not have been curding? could we not have been curding? could you not have been curding? could they not have been curding?