may countervail
Verbo regular: countervail - countervailed- countervailed

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

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

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

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