English verb conjugation
MUST FORESTALL

Regular verb: forestall - forestalled - forestalled

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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