English verb conjugation
SHOULD COUNTERVAIL

Regular verb: countervail - countervailed - countervailed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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