could preface
Verbe régulier : preface - prefaced- prefaced
Traduction française : préfacer - faire précéder 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could preface
you could preface
he could preface
we could preface
you could preface
they could preface 	I could be prefacing
you could be prefacing
he could be prefacing
we could be prefacing
you could be prefacing
they could be prefacing	I could have prefaced
you could have prefaced
he could have prefaced
we could have prefaced
you could have prefaced
they could have prefaced	I could have been prefacing
you could have been prefacing
he could have been prefacing
we could have been prefacing
you could have been prefacing
they could have been prefacing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could not preface
you could not preface
he could not preface
we could not preface
you could not preface
they could not preface 	I could not be prefacing
you could not be prefacing
he could not be prefacing
we could not be prefacing
you could not be prefacing
they could not be prefacing	I could not have prefaced
you could not have prefaced
he could not have prefaced
we could not have prefaced
you could not have prefaced
they could not have prefaced	I could not have been prefacing
you could not have been prefacing
he could not have been prefacing
we could not have been prefacing
you could not have been prefacing
they could not have been prefacing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I preface?
could you preface?
could he preface?
could we preface?
could you preface?
could they preface? 	could I be prefacing?
could you be prefacing?
could he be prefacing?
could we be prefacing?
could you be prefacing?
could they be prefacing? 	could I have prefaced?
could you have prefaced?
could he have prefaced?
could we have prefaced?
could you have prefaced?
could they have prefaced? 	could I have been prefacing?
could you have been prefacing?
could he have been prefacing?
could we have been prefacing?
could you have been prefacing?
could they have been prefacing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I not preface?
could you not preface?
could he not preface?
could we not preface?
could you not preface?
could they not preface? 	could I not be prefacing?
could you not be prefacing?
could he not be prefacing?
could we not be prefacing?
could you not be prefacing?
could they not be prefacing? 	could I not have prefaced?
could you not have prefaced?
could he not have prefaced?
could we not have prefaced?
could you not have prefaced?
could they not have prefaced? 	could I not have been prefacing?
could you not have been prefacing?
could he not have been prefacing?
could we not have been prefacing?
could you not have been prefacing?
could they not have been prefacing?