must countervail
Verbo regolare: countervail - countervailed- countervailed

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must countervail
you must countervail
she must countervail
we must countervail
you must countervail
they must countervail 	I must be countervailing
you must be countervailing
she must be countervailing
we must be countervailing
you must be countervailing
they must be countervailing	I must have countervailed
you must have countervailed
she must have countervailed
we must have countervailed
you must have countervailed
they must have countervailed	I must have been countervailing
you must have been countervailing
she must have been countervailing
we must have been countervailing
you must have been countervailing
they must have been countervailing	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not countervail
you must not countervail
she must not countervail
we must not countervail
you must not countervail
they must not countervail 	I must not be countervailing
you must not be countervailing
she must not be countervailing
we must not be countervailing
you must not be countervailing
they must not be countervailing	I must not have countervailed
you must not have countervailed
she must not have countervailed
we must not have countervailed
you must not have countervailed
they must not have countervailed	I must not have been countervailing
you must not have been countervailing
she must not have been countervailing
we must not have been countervailing
you must not have been countervailing
they must not have been countervailing	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I countervail?
must you countervail?
must she countervail?
must we countervail?
must you countervail?
must they countervail? 	must I be countervailing?
must you be countervailing?
must she be countervailing?
must we be countervailing?
must you be countervailing?
must they be countervailing? 	must I have countervailed?
must you have countervailed?
must she have countervailed?
must we have countervailed?
must you have countervailed?
must they have countervailed? 	must I have been countervailing?
must you have been countervailing?
must she have been countervailing?
must we have been countervailing?
must you have been countervailing?
must they have been countervailing? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not countervail?
must you not countervail?
must she not countervail?
must we not countervail?
must you not countervail?
must they not countervail? 	must I not be countervailing?
must you not be countervailing?
must she not be countervailing?
must we not be countervailing?
must you not be countervailing?
must they not be countervailing? 	must I not have countervailed?
must you not have countervailed?
must she not have countervailed?
must we not have countervailed?
must you not have countervailed?
must they not have countervailed? 	must I not have been countervailing?
must you not have been countervailing?
must she not have been countervailing?
must we not have been countervailing?
must you not have been countervailing?
must they not have been countervailing?