should retrogress
Verbe régulier : retrogress - retrogressed- retrogressed
Traduction française : régresser - rétrograder 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should retrogress
you should retrogress
he should retrogress
we should retrogress
you should retrogress
they should retrogress 	I should be retrogressing
you should be retrogressing
he should be retrogressing
we should be retrogressing
you should be retrogressing
they should be retrogressing	I should have retrogressed
you should have retrogressed
he should have retrogressed
we should have retrogressed
you should have retrogressed
they should have retrogressed	I should have been retrogressing
you should have been retrogressing
he should have been retrogressing
we should have been retrogressing
you should have been retrogressing
they should have been retrogressing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I should not retrogress
you should not retrogress
he should not retrogress
we should not retrogress
you should not retrogress
they should not retrogress 	I should not be retrogressing
you should not be retrogressing
he should not be retrogressing
we should not be retrogressing
you should not be retrogressing
they should not be retrogressing	I should not have retrogressed
you should not have retrogressed
he should not have retrogressed
we should not have retrogressed
you should not have retrogressed
they should not have retrogressed	I should not have been retrogressing
you should not have been retrogressing
he should not have been retrogressing
we should not have been retrogressing
you should not have been retrogressing
they should not have been retrogressing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I retrogress?
should you retrogress?
should he retrogress?
should we retrogress?
should you retrogress?
should they retrogress? 	should I be retrogressing?
should you be retrogressing?
should he be retrogressing?
should we be retrogressing?
should you be retrogressing?
should they be retrogressing? 	should I have retrogressed?
should you have retrogressed?
should he have retrogressed?
should we have retrogressed?
should you have retrogressed?
should they have retrogressed? 	should I have been retrogressing?
should you have been retrogressing?
should he have been retrogressing?
should we have been retrogressing?
should you have been retrogressing?
should they have been retrogressing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
should I not retrogress?
should you not retrogress?
should he not retrogress?
should we not retrogress?
should you not retrogress?
should they not retrogress? 	should I not be retrogressing?
should you not be retrogressing?
should he not be retrogressing?
should we not be retrogressing?
should you not be retrogressing?
should they not be retrogressing? 	should I not have retrogressed?
should you not have retrogressed?
should he not have retrogressed?
should we not have retrogressed?
should you not have retrogressed?
should they not have retrogressed? 	should I not have been retrogressing?
should you not have been retrogressing?
should he not have been retrogressing?
should we not have been retrogressing?
should you not have been retrogressing?
should they not have been retrogressing?