I could moo you could moo she could moo we could moo you could moo they could moo
Forma con V-ing
I could be mooing you could be mooing she could be mooing we could be mooing you could be mooing they could be mooing
Perfecto
I could have mooed you could have mooed she could have mooed we could have mooed you could have mooed they could have mooed
Perfecto con V-ing
I could have been mooing you could have been mooing she could have been mooing we could have been mooing you could have been mooing they could have been mooing
Negación
Forma simple
I could not moo you could not moo she could not moo we could not moo you could not moo they could not moo
Forma con V-ing
I could not be mooing you could not be mooing she could not be mooing we could not be mooing you could not be mooing they could not be mooing
Perfecto
I could not have mooed you could not have mooed she could not have mooed we could not have mooed you could not have mooed they could not have mooed
Perfecto con V-ing
I could not have been mooing you could not have been mooing she could not have been mooing we could not have been mooing you could not have been mooing they could not have been mooing
Forma interrogativa
Forma simple
could I moo? could you moo? could she moo? could we moo? could you moo? could they moo?
Forma con V-ing
could I be mooing? could you be mooing? could she be mooing? could we be mooing? could you be mooing? could they be mooing?
Perfecto
could I have mooed? could you have mooed? could she have mooed? could we have mooed? could you have mooed? could they have mooed?
Perfecto con V-ing
could I have been mooing? could you have been mooing? could she have been mooing? could we have been mooing? could you have been mooing? could they have been mooing?
Forma interro-negativa
Forma simple
could I not moo? could you not moo? could she not moo? could we not moo? could you not moo? could they not moo?
Forma con V-ing
could I not be mooing? could you not be mooing? could she not be mooing? could we not be mooing? could you not be mooing? could they not be mooing?
Perfecto
could I not have mooed? could you not have mooed? could she not have mooed? could we not have mooed? could you not have mooed? could they not have mooed?
Perfecto con V-ing
could I not have been mooing? could you not have been mooing? could she not have been mooing? could we not have been mooing? could you not have been mooing? could they not have been mooing?