could substantiate
Verbo regolare: substantiate - substantiated- substantiated

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con 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	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not substantiate
you could not substantiate
he could not substantiate
we could not substantiate
you could not substantiate
they could not substantiate 	I could not be substantiating
you could not be substantiating
he could not be substantiating
we could not be substantiating
you could not be substantiating
they could not be substantiating	I could not have substantiated
you could not have substantiated
he could not have substantiated
we could not have substantiated
you could not have substantiated
they could not have substantiated	I could not have been substantiating
you could not have been substantiating
he could not have been substantiating
we could not have been substantiating
you could not have been substantiating
they could not have been substantiating	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con 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? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not substantiate?
could you not substantiate?
could he not substantiate?
could we not substantiate?
could you not substantiate?
could they not substantiate? 	could I not be substantiating?
could you not be substantiating?
could he not be substantiating?
could we not be substantiating?
could you not be substantiating?
could they not be substantiating? 	could I not have substantiated?
could you not have substantiated?
could he not have substantiated?
could we not have substantiated?
could you not have substantiated?
could they not have substantiated? 	could I not have been substantiating?
could you not have been substantiating?
could he not have been substantiating?
could we not have been substantiating?
could you not have been substantiating?
could they not have been substantiating?