must vouch
Verbe régulier : vouch - vouched- vouched
Traduction française : se porter garant de quelqu'un ou quelque chose 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must vouch
you must vouch
he must vouch
we must vouch
you must vouch
they must vouch 	I must be vouching
you must be vouching
he must be vouching
we must be vouching
you must be vouching
they must be vouching	I must have vouched
you must have vouched
he must have vouched
we must have vouched
you must have vouched
they must have vouched	I must have been vouching
you must have been vouching
he must have been vouching
we must have been vouching
you must have been vouching
they must have been vouching	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not vouch
you must not vouch
he must not vouch
we must not vouch
you must not vouch
they must not vouch 	I must not be vouching
you must not be vouching
he must not be vouching
we must not be vouching
you must not be vouching
they must not be vouching	I must not have vouched
you must not have vouched
he must not have vouched
we must not have vouched
you must not have vouched
they must not have vouched	I must not have been vouching
you must not have been vouching
he must not have been vouching
we must not have been vouching
you must not have been vouching
they must not have been vouching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I vouch?
must you vouch?
must he vouch?
must we vouch?
must you vouch?
must they vouch? 	must I be vouching?
must you be vouching?
must he be vouching?
must we be vouching?
must you be vouching?
must they be vouching? 	must I have vouched?
must you have vouched?
must he have vouched?
must we have vouched?
must you have vouched?
must they have vouched? 	must I have been vouching?
must you have been vouching?
must he have been vouching?
must we have been vouching?
must you have been vouching?
must they have been vouching? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not vouch?
must you not vouch?
must he not vouch?
must we not vouch?
must you not vouch?
must they not vouch? 	must I not be vouching?
must you not be vouching?
must he not be vouching?
must we not be vouching?
must you not be vouching?
must they not be vouching? 	must I not have vouched?
must you not have vouched?
must he not have vouched?
must we not have vouched?
must you not have vouched?
must they not have vouched? 	must I not have been vouching?
must you not have been vouching?
must he not have been vouching?
must we not have been vouching?
must you not have been vouching?
must they not have been vouching?