English verb conjugation
SHOULD COUNTERVAIL

Regular verb: countervail - countervailed - countervailed

Affirmation

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

Negation

Simple form	V-ing form
I shouldn't countervail you shouldn't countervail he shouldn't countervail we shouldn't countervail you shouldn't countervail they shouldn't countervail	I shouldn't be countervailing you shouldn't be countervailing he shouldn't be countervailing we shouldn't be countervailing you shouldn't be countervailing they shouldn't be countervailing
Perfect	V-ing perfect
I shouldn't have countervailed you shouldn't have countervailed he shouldn't have countervailed we shouldn't have countervailed you shouldn't have countervailed they shouldn't have countervailed	I shouldn't have been countervailing you shouldn't have been countervailing he shouldn't have been countervailing we shouldn't have been countervailing you shouldn't have been countervailing they shouldn't 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
shouldn't I countervail? shouldn't you countervail? shouldn't he countervail? shouldn't we countervail? shouldn't you countervail? shouldn't they countervail?	shouldn't I be countervailing? shouldn't you be countervailing? shouldn't he be countervailing? shouldn't we be countervailing? shouldn't you be countervailing? shouldn't they be countervailing?
Perfect	V-ing perfect
shouldn't I have countervailed? shouldn't you have countervailed? shouldn't he have countervailed? shouldn't we have countervailed? shouldn't you have countervailed? shouldn't they have countervailed?	shouldn't I have been countervailing? shouldn't you have been countervailing? shouldn't he have been countervailing? shouldn't we have been countervailing? shouldn't you have been countervailing? shouldn't they have been countervailing?