should countervail
Verbe régulier : countervail - countervailed- countervailed

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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	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	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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	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	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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? 	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? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
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? 	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?