English verb conjugation
SHOULD FORESTALL

Regular verb: forestall - forestalled - forestalled

Affirmation

Simple form	V-ing form
I'd forestall you'd forestall she'd forestall we'd forestall you'd forestall they'd forestall	I'd be forestalling you'd be forestalling she'd be forestalling we'd be forestalling you'd be forestalling they'd be forestalling
Perfect	V-ing perfect
I should've forestalled you should've forestalled she should've forestalled we should've forestalled you should've forestalled they should've forestalled	I should've been forestalling you should've been forestalling she should've been forestalling we should've been forestalling you should've been forestalling they should've been forestalling

Negation

Simple form	V-ing form
I shouldn't forestall you shouldn't forestall she shouldn't forestall we shouldn't forestall you shouldn't forestall they shouldn't forestall	I shouldn't be forestalling you shouldn't be forestalling she shouldn't be forestalling we shouldn't be forestalling you shouldn't be forestalling they shouldn't be forestalling
Perfect	V-ing perfect
I shouldn't have forestalled you shouldn't have forestalled she shouldn't have forestalled we shouldn't have forestalled you shouldn't have forestalled they shouldn't have forestalled	I shouldn't have been forestalling you shouldn't have been forestalling she shouldn't have been forestalling we shouldn't have been forestalling you shouldn't have been forestalling they shouldn't have been forestalling

Interrogative form

Simple form	V-ing form
should I forestall? should you forestall? should she forestall? should we forestall? should you forestall? should they forestall?	should I be forestalling? should you be forestalling? should she be forestalling? should we be forestalling? should you be forestalling? should they be forestalling?
Perfect	V-ing perfect
should I have forestalled? should you have forestalled? should she have forestalled? should we have forestalled? should you have forestalled? should they have forestalled?	should I have been forestalling? should you have been forestalling? should she have been forestalling? should we have been forestalling? should you have been forestalling? should they have been forestalling?

Interro-negative form

Simple form	V-ing form
shouldn't I forestall? shouldn't you forestall? shouldn't she forestall? shouldn't we forestall? shouldn't you forestall? shouldn't they forestall?	shouldn't I be forestalling? shouldn't you be forestalling? shouldn't she be forestalling? shouldn't we be forestalling? shouldn't you be forestalling? shouldn't they be forestalling?
Perfect	V-ing perfect
shouldn't I have forestalled? shouldn't you have forestalled? shouldn't she have forestalled? shouldn't we have forestalled? shouldn't you have forestalled? shouldn't they have forestalled?	shouldn't I have been forestalling? shouldn't you have been forestalling? shouldn't she have been forestalling? shouldn't we have been forestalling? shouldn't you have been forestalling? shouldn't they have been forestalling?