could rarefy
Verbo regular: rarefy - rarefied- rarefied

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could rarefy
you could rarefy
he could rarefy
we could rarefy
you could rarefy
they could rarefy 	I could be rarefying
you could be rarefying
he could be rarefying
we could be rarefying
you could be rarefying
they could be rarefying	I could have rarefied
you could have rarefied
he could have rarefied
we could have rarefied
you could have rarefied
they could have rarefied	I could have been rarefying
you could have been rarefying
he could have been rarefying
we could have been rarefying
you could have been rarefying
they could have been rarefying	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not rarefy
you could not rarefy
he could not rarefy
we could not rarefy
you could not rarefy
they could not rarefy 	I could not be rarefying
you could not be rarefying
he could not be rarefying
we could not be rarefying
you could not be rarefying
they could not be rarefying	I could not have rarefied
you could not have rarefied
he could not have rarefied
we could not have rarefied
you could not have rarefied
they could not have rarefied	I could not have been rarefying
you could not have been rarefying
he could not have been rarefying
we could not have been rarefying
you could not have been rarefying
they could not have been rarefying	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I rarefy?
could you rarefy?
could he rarefy?
could we rarefy?
could you rarefy?
could they rarefy? 	could I be rarefying?
could you be rarefying?
could he be rarefying?
could we be rarefying?
could you be rarefying?
could they be rarefying? 	could I have rarefied?
could you have rarefied?
could he have rarefied?
could we have rarefied?
could you have rarefied?
could they have rarefied? 	could I have been rarefying?
could you have been rarefying?
could he have been rarefying?
could we have been rarefying?
could you have been rarefying?
could they have been rarefying? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not rarefy?
could you not rarefy?
could he not rarefy?
could we not rarefy?
could you not rarefy?
could they not rarefy? 	could I not be rarefying?
could you not be rarefying?
could he not be rarefying?
could we not be rarefying?
could you not be rarefying?
could they not be rarefying? 	could I not have rarefied?
could you not have rarefied?
could he not have rarefied?
could we not have rarefied?
could you not have rarefied?
could they not have rarefied? 	could I not have been rarefying?
could you not have been rarefying?
could he not have been rarefying?
could we not have been rarefying?
could you not have been rarefying?
could they not have been rarefying?