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
she must vouch
we must vouch
you must vouch
they must vouch 	I must be vouching
you must be vouching
she must be vouching
we must be vouching
you must be vouching
they must be vouching	I must have vouched
you must have vouched
she 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
she 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 mustn't vouch
you mustn't vouch
she mustn't vouch
we mustn't vouch
you mustn't vouch
they mustn't vouch 	I mustn't be vouching
you mustn't be vouching
she mustn't be vouching
we mustn't be vouching
you mustn't be vouching
they mustn't be vouching	I mustn't have vouched
you mustn't have vouched
she mustn't have vouched
we mustn't have vouched
you mustn't have vouched
they mustn't have vouched	I mustn't have been vouching
you mustn't have been vouching
she mustn't have been vouching
we mustn't have been vouching
you mustn't have been vouching
they mustn't have been vouching	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I vouch?
must you vouch?
must she vouch?
must we vouch?
must you vouch?
must they vouch? 	must I be vouching?
must you be vouching?
must she be vouching?
must we be vouching?
must you be vouching?
must they be vouching? 	must I have vouched?
must you have vouched?
must she 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 she 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 	
mustn't I vouch?
mustn't you vouch?
mustn't she vouch?
mustn't we vouch?
mustn't you vouch?
mustn't they vouch? 	mustn't I be vouching?
mustn't you be vouching?
mustn't she be vouching?
mustn't we be vouching?
mustn't you be vouching?
mustn't they be vouching? 	mustn't I have vouched?
mustn't you have vouched?
mustn't she have vouched?
mustn't we have vouched?
mustn't you have vouched?
mustn't they have vouched? 	mustn't I have been vouching?
mustn't you have been vouching?
mustn't she have been vouching?
mustn't we have been vouching?
mustn't you have been vouching?
mustn't they have been vouching?