could retrogress
Verbo regolare: retrogress - retrogressed- retrogressed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could retrogress
you could retrogress
she could retrogress
we could retrogress
you could retrogress
they could retrogress 	I could be retrogressing
you could be retrogressing
she could be retrogressing
we could be retrogressing
you could be retrogressing
they could be retrogressing	I could have retrogressed
you could have retrogressed
she 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
she could have been retrogressing
we could have been retrogressing
you could have been retrogressing
they could have been retrogressing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not retrogress
you could not retrogress
she 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
she could not be retrogressing
we could not be retrogressing
you could not be retrogressing
they could not be retrogressing	I could not have retrogressed
you could not have retrogressed
she 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
she 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 semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I retrogress?
could you retrogress?
could she retrogress?
could we retrogress?
could you retrogress?
could they retrogress? 	could I be retrogressing?
could you be retrogressing?
could she be retrogressing?
could we be retrogressing?
could you be retrogressing?
could they be retrogressing? 	could I have retrogressed?
could you have retrogressed?
could she 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 she have been retrogressing?
could we have been retrogressing?
could you have been retrogressing?
could they have been retrogressing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not retrogress?
could you not retrogress?
could she 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 she not be retrogressing?
could we not be retrogressing?
could you not be retrogressing?
could they not be retrogressing? 	could I not have retrogressed?
could you not have retrogressed?
could she 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 she not have been retrogressing?
could we not have been retrogressing?
could you not have been retrogressing?
could they not have been retrogressing?