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 must not volunteer
you must not volunteer
he must not volunteer
we must not volunteer
you must not volunteer
they must not volunteer 	I must not be volunteering
you must not be volunteering
he must not be volunteering
we must not be volunteering
you must not be volunteering
they must not be volunteering	I must not have volunteered
you must not have volunteered
he must not have volunteered
we must not have volunteered
you must not have volunteered
they must not have volunteered	I must not have been volunteering
you must not have been volunteering
he must not have been volunteering
we must not have been volunteering
you must not have been volunteering
they must not 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 	
must I not volunteer?
must you not volunteer?
must he not volunteer?
must we not volunteer?
must you not volunteer?
must they not volunteer? 	must I not be volunteering?
must you not be volunteering?
must he not be volunteering?
must we not be volunteering?
must you not be volunteering?
must they not be volunteering? 	must I not have volunteered?
must you not have volunteered?
must he not have volunteered?
must we not have volunteered?
must you not have volunteered?
must they not have volunteered? 	must I not have been volunteering?
must you not have been volunteering?
must he not have been volunteering?
must we not have been volunteering?
must you not have been volunteering?
must they not have been volunteering?