must 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 must substantiate
you must substantiate
she must substantiate
we must substantiate
you must substantiate
they must substantiate 	I must be substantiating
you must be substantiating
she must be substantiating
we must be substantiating
you must be substantiating
they must be substantiating	I must have substantiated
you must have substantiated
she must have substantiated
we must have substantiated
you must have substantiated
they must have substantiated	I must have been substantiating
you must have been substantiating
she must have been substantiating
we must have been substantiating
you must have been substantiating
they must have been substantiating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not substantiate
you must not substantiate
she must not substantiate
we must not substantiate
you must not substantiate
they must not substantiate 	I must not be substantiating
you must not be substantiating
she must not be substantiating
we must not be substantiating
you must not be substantiating
they must not be substantiating	I must not have substantiated
you must not have substantiated
she must not have substantiated
we must not have substantiated
you must not have substantiated
they must not have substantiated	I must not have been substantiating
you must not have been substantiating
she must not have been substantiating
we must not have been substantiating
you must not have been substantiating
they must not have been substantiating	

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

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not substantiate?
must you not substantiate?
must she not substantiate?
must we not substantiate?
must you not substantiate?
must they not substantiate? 	must I not be substantiating?
must you not be substantiating?
must she not be substantiating?
must we not be substantiating?
must you not be substantiating?
must they not be substantiating? 	must I not have substantiated?
must you not have substantiated?
must she not have substantiated?
must we not have substantiated?
must you not have substantiated?
must they not have substantiated? 	must I not have been substantiating?
must you not have been substantiating?
must she not have been substantiating?
must we not have been substantiating?
must you not have been substantiating?
must they not have been substantiating?