English verb conjugation
SHOULD COUNTERVAIL

Regular verb: countervail - countervailed - countervailed

Affirmation

Simple form	V-ing form
I'd countervail you'd countervail she'd countervail we'd countervail you'd countervail they'd countervail	I'd be countervailing you'd be countervailing she'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 she 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 she 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 she 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 she 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 she 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 she 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 she countervail? should we countervail? should you countervail? should they countervail?	should I be countervailing? should you be countervailing? should she 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 she 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 she 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 she 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 she 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 she 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 she have been countervailing? shouldn't we have been countervailing? shouldn't you have been countervailing? shouldn't they have been countervailing?