may substantiate
Regular verb: substantiate - substantiated- substantiated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may substantiate
you may substantiate
she may substantiate
we may substantiate
you may substantiate
they may substantiate 	I may be substantiating
you may be substantiating
she may be substantiating
we may be substantiating
you may be substantiating
they may be substantiating	I may have substantiated
you may have substantiated
she may have substantiated
we may have substantiated
you may have substantiated
they may have substantiated	I may have been substantiating
you may have been substantiating
she may have been substantiating
we may have been substantiating
you may have been substantiating
they may have been substantiating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't substantiate
you mayn't substantiate
she mayn't substantiate
we mayn't substantiate
you mayn't substantiate
they mayn't substantiate 	I mayn't be substantiating
you mayn't be substantiating
she mayn't be substantiating
we mayn't be substantiating
you mayn't be substantiating
they mayn't be substantiating	I mayn't have substantiated
you mayn't have substantiated
she mayn't have substantiated
we mayn't have substantiated
you mayn't have substantiated
they mayn't have substantiated	I mayn't have been substantiating
you mayn't have been substantiating
she mayn't have been substantiating
we mayn't have been substantiating
you mayn't have been substantiating
they mayn't have been substantiating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I substantiate?
may you substantiate?
may she substantiate?
may we substantiate?
may you substantiate?
may they substantiate? 	may I be substantiating?
may you be substantiating?
may she be substantiating?
may we be substantiating?
may you be substantiating?
may they be substantiating? 	may I have substantiated?
may you have substantiated?
may she have substantiated?
may we have substantiated?
may you have substantiated?
may they have substantiated? 	may I have been substantiating?
may you have been substantiating?
may she have been substantiating?
may we have been substantiating?
may you have been substantiating?
may they have been substantiating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I substantiate?
mayn't you substantiate?
mayn't she substantiate?
mayn't we substantiate?
mayn't you substantiate?
mayn't they substantiate? 	mayn't I be substantiating?
mayn't you be substantiating?
mayn't she be substantiating?
mayn't we be substantiating?
mayn't you be substantiating?
mayn't they be substantiating? 	mayn't I have substantiated?
mayn't you have substantiated?
mayn't she have substantiated?
mayn't we have substantiated?
mayn't you have substantiated?
mayn't they have substantiated? 	mayn't I have been substantiating?
mayn't you have been substantiating?
mayn't she have been substantiating?
mayn't we have been substantiating?
mayn't you have been substantiating?
mayn't they have been substantiating?