Conjugación del verbo inglés
COULD RETROGRESS

Verbo regular: retrogress - retrogressed - retrogressed

Afirmación

Forma simple	Forma con V-ing
I could retrogress you could retrogress he could retrogress we could retrogress you could retrogress they could retrogress	I could be retrogressing you could be retrogressing he could be retrogressing we could be retrogressing you could be retrogressing they could be retrogressing
Perfecto	Perfecto con V-ing
I could have retrogressed you could have retrogressed he could have retrogressed we could have retrogressed you could have retrogressed they could have retrogressed	I could have been retrogressing you could have been retrogressing he could have been retrogressing we could have been retrogressing you could have been retrogressing they could have been retrogressing

Negación

Forma simple	Forma con V-ing
I could not retrogress you could not retrogress he could not retrogress we could not retrogress you could not retrogress they could not retrogress	I could not be retrogressing you could not be retrogressing he could not be retrogressing we could not be retrogressing you could not be retrogressing they could not be retrogressing
Perfecto	Perfecto con V-ing
I could not have retrogressed you could not have retrogressed he could not have retrogressed we could not have retrogressed you could not have retrogressed they could not have retrogressed	I could not have been retrogressing you could not have been retrogressing he could not have been retrogressing we could not have been retrogressing you could not have been retrogressing they could not have been retrogressing

Forma interrogativa

Forma simple	Forma con V-ing
could I retrogress? could you retrogress? could he retrogress? could we retrogress? could you retrogress? could they retrogress?	could I be retrogressing? could you be retrogressing? could he be retrogressing? could we be retrogressing? could you be retrogressing? could they be retrogressing?
Perfecto	Perfecto con V-ing
could I have retrogressed? could you have retrogressed? could he have retrogressed? could we have retrogressed? could you have retrogressed? could they have retrogressed?	could I have been retrogressing? could you have been retrogressing? could he have been retrogressing? could we have been retrogressing? could you have been retrogressing? could they have been retrogressing?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not retrogress? could you not retrogress? could he not retrogress? could we not retrogress? could you not retrogress? could they not retrogress?	could I not be retrogressing? could you not be retrogressing? could he not be retrogressing? could we not be retrogressing? could you not be retrogressing? could they not be retrogressing?
Perfecto	Perfecto con V-ing
could I not have retrogressed? could you not have retrogressed? could he not have retrogressed? could we not have retrogressed? could you not have retrogressed? could they not have retrogressed?	could I not have been retrogressing? could you not have been retrogressing? could he not have been retrogressing? could we not have been retrogressing? could you not have been retrogressing? could they not have been retrogressing?