English verb conjugation
COULD FORESTALL

Regular verb: forestall - forestalled - forestalled

Affirmation

Simple form	V-ing form
I could forestall you could forestall he could forestall we could forestall you could forestall they could forestall	I could be forestalling you could be forestalling he could be forestalling we could be forestalling you could be forestalling they could be forestalling
Perfect	V-ing perfect
I could have forestalled you could have forestalled he could have forestalled we could have forestalled you could have forestalled they could have forestalled	I could have been forestalling you could have been forestalling he could have been forestalling we could have been forestalling you could have been forestalling they could have been forestalling

Negation

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

Interrogative form

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

Interro-negative form

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