could regress
Verbe régulier : regress - regressed- regressed
Traduction française : régresser - reculer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could regress
you could regress
he could regress
we could regress
you could regress
they could regress 	I could be regressing
you could be regressing
he could be regressing
we could be regressing
you could be regressing
they could be regressing	I could have regressed
you could have regressed
he could have regressed
we could have regressed
you could have regressed
they could have regressed	I could have been regressing
you could have been regressing
he could have been regressing
we could have been regressing
you could have been regressing
they could have been regressing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not regress
you could not regress
he could not regress
we could not regress
you could not regress
they could not regress 	I could not be regressing
you could not be regressing
he could not be regressing
we could not be regressing
you could not be regressing
they could not be regressing	I could not have regressed
you could not have regressed
he could not have regressed
we could not have regressed
you could not have regressed
they could not have regressed	I could not have been regressing
you could not have been regressing
he could not have been regressing
we could not have been regressing
you could not have been regressing
they could not have been regressing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I regress?
could you regress?
could he regress?
could we regress?
could you regress?
could they regress? 	could I be regressing?
could you be regressing?
could he be regressing?
could we be regressing?
could you be regressing?
could they be regressing? 	could I have regressed?
could you have regressed?
could he have regressed?
could we have regressed?
could you have regressed?
could they have regressed? 	could I have been regressing?
could you have been regressing?
could he have been regressing?
could we have been regressing?
could you have been regressing?
could they have been regressing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not regress?
could you not regress?
could he not regress?
could we not regress?
could you not regress?
could they not regress? 	could I not be regressing?
could you not be regressing?
could he not be regressing?
could we not be regressing?
could you not be regressing?
could they not be regressing? 	could I not have regressed?
could you not have regressed?
could he not have regressed?
could we not have regressed?
could you not have regressed?
could they not have regressed? 	could I not have been regressing?
could you not have been regressing?
could he not have been regressing?
could we not have been regressing?
could you not have been regressing?
could they not have been regressing?