could countervail
Verbo regular: countervail - countervailed- countervailed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could countervail
you could countervail
she could countervail
we could countervail
you could countervail
they could countervail 	I could be countervailing
you could be countervailing
she could be countervailing
we could be countervailing
you could be countervailing
they could be countervailing	I could have countervailed
you could have countervailed
she could have countervailed
we could have countervailed
you could have countervailed
they could have countervailed	I could have been countervailing
you could have been countervailing
she could have been countervailing
we could have been countervailing
you could have been countervailing
they could have been countervailing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could not countervail
you could not countervail
she could not countervail
we could not countervail
you could not countervail
they could not countervail 	I could not be countervailing
you could not be countervailing
she could not be countervailing
we could not be countervailing
you could not be countervailing
they could not be countervailing	I could not have countervailed
you could not have countervailed
she could not have countervailed
we could not have countervailed
you could not have countervailed
they could not have countervailed	I could not have been countervailing
you could not have been countervailing
she could not have been countervailing
we could not have been countervailing
you could not have been countervailing
they could not have been countervailing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I countervail?
could you countervail?
could she countervail?
could we countervail?
could you countervail?
could they countervail? 	could I be countervailing?
could you be countervailing?
could she be countervailing?
could we be countervailing?
could you be countervailing?
could they be countervailing? 	could I have countervailed?
could you have countervailed?
could she have countervailed?
could we have countervailed?
could you have countervailed?
could they have countervailed? 	could I have been countervailing?
could you have been countervailing?
could she have been countervailing?
could we have been countervailing?
could you have been countervailing?
could they have been countervailing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I not countervail?
could you not countervail?
could she not countervail?
could we not countervail?
could you not countervail?
could they not countervail? 	could I not be countervailing?
could you not be countervailing?
could she not be countervailing?
could we not be countervailing?
could you not be countervailing?
could they not be countervailing? 	could I not have countervailed?
could you not have countervailed?
could she not have countervailed?
could we not have countervailed?
could you not have countervailed?
could they not have countervailed? 	could I not have been countervailing?
could you not have been countervailing?
could she not have been countervailing?
could we not have been countervailing?
could you not have been countervailing?
could they not have been countervailing?