English verb conjugation
MAY COUNTERVAIL

Regular verb: countervail - countervailed - countervailed

Affirmation

Simple form	V-ing form
I may countervail you may countervail he may countervail we may countervail you may countervail they may countervail	I may be countervailing you may be countervailing he may be countervailing we may be countervailing you may be countervailing they may be countervailing
Perfect	V-ing perfect
I may have countervailed you may have countervailed he 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 he may have been countervailing we may have been countervailing you may have been countervailing they may have been countervailing

Negation

Simple form	V-ing form
I may not countervail you may not countervail he 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 he may not be countervailing we may not be countervailing you may not be countervailing they may not be countervailing
Perfect	V-ing perfect
I may not have countervailed you may not have countervailed he 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 he may not have been countervailing we may not have been countervailing you may not have been countervailing they may not have been countervailing

Interrogative form

Simple form	V-ing form
may I countervail? may you countervail? may he countervail? may we countervail? may you countervail? may they countervail?	may I be countervailing? may you be countervailing? may he be countervailing? may we be countervailing? may you be countervailing? may they be countervailing?
Perfect	V-ing perfect
may I have countervailed? may you have countervailed? may he 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 he have been countervailing? may we have been countervailing? may you have been countervailing? may they have been countervailing?

Interro-negative form

Simple form	V-ing form
may I not countervail? may you not countervail? may he 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 he not be countervailing? may we not be countervailing? may you not be countervailing? may they not be countervailing?
Perfect	V-ing perfect
may I not have countervailed? may you not have countervailed? may he 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 he not have been countervailing? may we not have been countervailing? may you not have been countervailing? may they not have been countervailing?