must volunteer
Verbe régulier : volunteer - volunteered- volunteered
Traduction française : donner ou fournir spontanément - se porter volontaire 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must volunteer
you must volunteer
he must volunteer
we must volunteer
you must volunteer
they must volunteer 	I must be volunteering
you must be volunteering
he must be volunteering
we must be volunteering
you must be volunteering
they must be volunteering	I must have volunteered
you must have volunteered
he must have volunteered
we must have volunteered
you must have volunteered
they must have volunteered	I must have been volunteering
you must have been volunteering
he must have been volunteering
we must have been volunteering
you must have been volunteering
they must have been volunteering	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't volunteer
you mustn't volunteer
he mustn't volunteer
we mustn't volunteer
you mustn't volunteer
they mustn't volunteer 	I mustn't be volunteering
you mustn't be volunteering
he mustn't be volunteering
we mustn't be volunteering
you mustn't be volunteering
they mustn't be volunteering	I mustn't have volunteered
you mustn't have volunteered
he mustn't have volunteered
we mustn't have volunteered
you mustn't have volunteered
they mustn't have volunteered	I mustn't have been volunteering
you mustn't have been volunteering
he mustn't have been volunteering
we mustn't have been volunteering
you mustn't have been volunteering
they mustn't have been volunteering	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I volunteer?
must you volunteer?
must he volunteer?
must we volunteer?
must you volunteer?
must they volunteer? 	must I be volunteering?
must you be volunteering?
must he be volunteering?
must we be volunteering?
must you be volunteering?
must they be volunteering? 	must I have volunteered?
must you have volunteered?
must he have volunteered?
must we have volunteered?
must you have volunteered?
must they have volunteered? 	must I have been volunteering?
must you have been volunteering?
must he have been volunteering?
must we have been volunteering?
must you have been volunteering?
must they have been volunteering? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I volunteer?
mustn't you volunteer?
mustn't he volunteer?
mustn't we volunteer?
mustn't you volunteer?
mustn't they volunteer? 	mustn't I be volunteering?
mustn't you be volunteering?
mustn't he be volunteering?
mustn't we be volunteering?
mustn't you be volunteering?
mustn't they be volunteering? 	mustn't I have volunteered?
mustn't you have volunteered?
mustn't he have volunteered?
mustn't we have volunteered?
mustn't you have volunteered?
mustn't they have volunteered? 	mustn't I have been volunteering?
mustn't you have been volunteering?
mustn't he have been volunteering?
mustn't we have been volunteering?
mustn't you have been volunteering?
mustn't they have been volunteering?