could circumstantiate
Verbo regular: circumstantiate - circumstantiated- circumstantiated

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could circumstantiate
you could circumstantiate
he could circumstantiate
we could circumstantiate
you could circumstantiate
they could circumstantiate 	I could be circumstantiating
you could be circumstantiating
he could be circumstantiating
we could be circumstantiating
you could be circumstantiating
they could be circumstantiating	I could have circumstantiated
you could have circumstantiated
he could have circumstantiated
we could have circumstantiated
you could have circumstantiated
they could have circumstantiated	I could have been circumstantiating
you could have been circumstantiating
he could have been circumstantiating
we could have been circumstantiating
you could have been circumstantiating
they could have been circumstantiating	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not circumstantiate
you could not circumstantiate
he could not circumstantiate
we could not circumstantiate
you could not circumstantiate
they could not circumstantiate 	I could not be circumstantiating
you could not be circumstantiating
he could not be circumstantiating
we could not be circumstantiating
you could not be circumstantiating
they could not be circumstantiating	I could not have circumstantiated
you could not have circumstantiated
he could not have circumstantiated
we could not have circumstantiated
you could not have circumstantiated
they could not have circumstantiated	I could not have been circumstantiating
you could not have been circumstantiating
he could not have been circumstantiating
we could not have been circumstantiating
you could not have been circumstantiating
they could not have been circumstantiating	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I circumstantiate?
could you circumstantiate?
could he circumstantiate?
could we circumstantiate?
could you circumstantiate?
could they circumstantiate? 	could I be circumstantiating?
could you be circumstantiating?
could he be circumstantiating?
could we be circumstantiating?
could you be circumstantiating?
could they be circumstantiating? 	could I have circumstantiated?
could you have circumstantiated?
could he have circumstantiated?
could we have circumstantiated?
could you have circumstantiated?
could they have circumstantiated? 	could I have been circumstantiating?
could you have been circumstantiating?
could he have been circumstantiating?
could we have been circumstantiating?
could you have been circumstantiating?
could they have been circumstantiating? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not circumstantiate?
could you not circumstantiate?
could he not circumstantiate?
could we not circumstantiate?
could you not circumstantiate?
could they not circumstantiate? 	could I not be circumstantiating?
could you not be circumstantiating?
could he not be circumstantiating?
could we not be circumstantiating?
could you not be circumstantiating?
could they not be circumstantiating? 	could I not have circumstantiated?
could you not have circumstantiated?
could he not have circumstantiated?
could we not have circumstantiated?
could you not have circumstantiated?
could they not have circumstantiated? 	could I not have been circumstantiating?
could you not have been circumstantiating?
could he not have been circumstantiating?
could we not have been circumstantiating?
could you not have been circumstantiating?
could they not have been circumstantiating?