could substantiate
Verbe régulier : substantiate - substantiated- substantiated
Traduction française : confirmer - apporter ou fournir des preuves à l'appui de 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I could substantiate
you could substantiate
he could substantiate
we could substantiate
you could substantiate
they could substantiate 	I could be substantiating
you could be substantiating
he could be substantiating
we could be substantiating
you could be substantiating
they could be substantiating	I could have substantiated
you could have substantiated
he could have substantiated
we could have substantiated
you could have substantiated
they could have substantiated	I could have been substantiating
you could have been substantiating
he could have been substantiating
we could have been substantiating
you could have been substantiating
they could have been substantiating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I couldn't substantiate
you couldn't substantiate
he couldn't substantiate
we couldn't substantiate
you couldn't substantiate
they couldn't substantiate 	I couldn't be substantiating
you couldn't be substantiating
he couldn't be substantiating
we couldn't be substantiating
you couldn't be substantiating
they couldn't be substantiating	I couldn't have substantiated
you couldn't have substantiated
he couldn't have substantiated
we couldn't have substantiated
you couldn't have substantiated
they couldn't have substantiated	I couldn't have been substantiating
you couldn't have been substantiating
he couldn't have been substantiating
we couldn't have been substantiating
you couldn't have been substantiating
they couldn't have been substantiating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
could I substantiate?
could you substantiate?
could he substantiate?
could we substantiate?
could you substantiate?
could they substantiate? 	could I be substantiating?
could you be substantiating?
could he be substantiating?
could we be substantiating?
could you be substantiating?
could they be substantiating? 	could I have substantiated?
could you have substantiated?
could he have substantiated?
could we have substantiated?
could you have substantiated?
could they have substantiated? 	could I have been substantiating?
could you have been substantiating?
could he have been substantiating?
could we have been substantiating?
could you have been substantiating?
could they have been substantiating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
couldn't I substantiate?
couldn't you substantiate?
couldn't he substantiate?
couldn't we substantiate?
couldn't you substantiate?
couldn't they substantiate? 	couldn't I be substantiating?
couldn't you be substantiating?
couldn't he be substantiating?
couldn't we be substantiating?
couldn't you be substantiating?
couldn't they be substantiating? 	couldn't I have substantiated?
couldn't you have substantiated?
couldn't he have substantiated?
couldn't we have substantiated?
couldn't you have substantiated?
couldn't they have substantiated? 	couldn't I have been substantiating?
couldn't you have been substantiating?
couldn't he have been substantiating?
couldn't we have been substantiating?
couldn't you have been substantiating?
couldn't they have been substantiating?