must barn
Verbe régulier : barn - barned- barned

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must barn
you must barn
he must barn
we must barn
you must barn
they must barn 	I must be barning
you must be barning
he must be barning
we must be barning
you must be barning
they must be barning	I must have barned
you must have barned
he must have barned
we must have barned
you must have barned
they must have barned	I must have been barning
you must have been barning
he must have been barning
we must have been barning
you must have been barning
they must have been barning	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't barn
you mustn't barn
he mustn't barn
we mustn't barn
you mustn't barn
they mustn't barn 	I mustn't be barning
you mustn't be barning
he mustn't be barning
we mustn't be barning
you mustn't be barning
they mustn't be barning	I mustn't have barned
you mustn't have barned
he mustn't have barned
we mustn't have barned
you mustn't have barned
they mustn't have barned	I mustn't have been barning
you mustn't have been barning
he mustn't have been barning
we mustn't have been barning
you mustn't have been barning
they mustn't have been barning	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I barn?
must you barn?
must he barn?
must we barn?
must you barn?
must they barn? 	must I be barning?
must you be barning?
must he be barning?
must we be barning?
must you be barning?
must they be barning? 	must I have barned?
must you have barned?
must he have barned?
must we have barned?
must you have barned?
must they have barned? 	must I have been barning?
must you have been barning?
must he have been barning?
must we have been barning?
must you have been barning?
must they have been barning? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I barn?
mustn't you barn?
mustn't he barn?
mustn't we barn?
mustn't you barn?
mustn't they barn? 	mustn't I be barning?
mustn't you be barning?
mustn't he be barning?
mustn't we be barning?
mustn't you be barning?
mustn't they be barning? 	mustn't I have barned?
mustn't you have barned?
mustn't he have barned?
mustn't we have barned?
mustn't you have barned?
mustn't they have barned? 	mustn't I have been barning?
mustn't you have been barning?
mustn't he have been barning?
mustn't we have been barning?
mustn't you have been barning?
mustn't they have been barning?