I could describe you could describe he could describe we could describe you could describe they could describe
Forma con V-ing
I could be describing you could be describing he could be describing we could be describing you could be describing they could be describing
Perfecto
I could have described you could have described he could have described we could have described you could have described they could have described
Perfecto con V-ing
I could have been describing you could have been describing he could have been describing we could have been describing you could have been describing they could have been describing
Negación
Forma simple
I could not describe you could not describe he could not describe we could not describe you could not describe they could not describe
Forma con V-ing
I could not be describing you could not be describing he could not be describing we could not be describing you could not be describing they could not be describing
Perfecto
I could not have described you could not have described he could not have described we could not have described you could not have described they could not have described
Perfecto con V-ing
I could not have been describing you could not have been describing he could not have been describing we could not have been describing you could not have been describing they could not have been describing
Forma interrogativa
Forma simple
could I describe? could you describe? could he describe? could we describe? could you describe? could they describe?
Forma con V-ing
could I be describing? could you be describing? could he be describing? could we be describing? could you be describing? could they be describing?
Perfecto
could I have described? could you have described? could he have described? could we have described? could you have described? could they have described?
Perfecto con V-ing
could I have been describing? could you have been describing? could he have been describing? could we have been describing? could you have been describing? could they have been describing?
Forma interro-negativa
Forma simple
could I not describe? could you not describe? could he not describe? could we not describe? could you not describe? could they not describe?
Forma con V-ing
could I not be describing? could you not be describing? could he not be describing? could we not be describing? could you not be describing? could they not be describing?
Perfecto
could I not have described? could you not have described? could he not have described? could we not have described? could you not have described? could they not have described?
Perfecto con V-ing
could I not have been describing? could you not have been describing? could he not have been describing? could we not have been describing? could you not have been describing? could they not have been describing?