Conjugación del verbo inglés
MUST COUNTERVAIL

Verbo regular: countervail - countervailed - countervailed

Afirmación

Forma simple	Forma con V-ing
I must countervail you must countervail he must countervail we must countervail you must countervail they must countervail	I must be countervailing you must be countervailing he must be countervailing we must be countervailing you must be countervailing they must be countervailing
Perfecto	Perfecto con V-ing
I must have countervailed you must have countervailed he 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 he must have been countervailing we must have been countervailing you must have been countervailing they must have been countervailing

Negación

Forma simple	Forma con V-ing
I must not countervail you must not countervail he 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 he must not be countervailing we must not be countervailing you must not be countervailing they must not be countervailing
Perfecto	Perfecto con V-ing
I must not have countervailed you must not have countervailed he 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 he 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 simple	Forma con V-ing
must I countervail? must you countervail? must he countervail? must we countervail? must you countervail? must they countervail?	must I be countervailing? must you be countervailing? must he be countervailing? must we be countervailing? must you be countervailing? must they be countervailing?
Perfecto	Perfecto con V-ing
must I have countervailed? must you have countervailed? must he 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 he have been countervailing? must we have been countervailing? must you have been countervailing? must they have been countervailing?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not countervail? must you not countervail? must he 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 he not be countervailing? must we not be countervailing? must you not be countervailing? must they not be countervailing?
Perfecto	Perfecto con V-ing
must I not have countervailed? must you not have countervailed? must he 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 he not have been countervailing? must we not have been countervailing? must you not have been countervailing? must they not have been countervailing?