must forestall
Verbe régulier : forestall - forestalled- forestalled
Traduction française : empêcher - anticiper 

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

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

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

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