must ferule
Verbe régulier : ferule - feruled- feruled

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must ferule
you must ferule
she must ferule
we must ferule
you must ferule
they must ferule 	I must be feruling
you must be feruling
she must be feruling
we must be feruling
you must be feruling
they must be feruling	I must have feruled
you must have feruled
she must have feruled
we must have feruled
you must have feruled
they must have feruled	I must have been feruling
you must have been feruling
she must have been feruling
we must have been feruling
you must have been feruling
they must have been feruling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't ferule
you mustn't ferule
she mustn't ferule
we mustn't ferule
you mustn't ferule
they mustn't ferule 	I mustn't be feruling
you mustn't be feruling
she mustn't be feruling
we mustn't be feruling
you mustn't be feruling
they mustn't be feruling	I mustn't have feruled
you mustn't have feruled
she mustn't have feruled
we mustn't have feruled
you mustn't have feruled
they mustn't have feruled	I mustn't have been feruling
you mustn't have been feruling
she mustn't have been feruling
we mustn't have been feruling
you mustn't have been feruling
they mustn't have been feruling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I ferule?
must you ferule?
must she ferule?
must we ferule?
must you ferule?
must they ferule? 	must I be feruling?
must you be feruling?
must she be feruling?
must we be feruling?
must you be feruling?
must they be feruling? 	must I have feruled?
must you have feruled?
must she have feruled?
must we have feruled?
must you have feruled?
must they have feruled? 	must I have been feruling?
must you have been feruling?
must she have been feruling?
must we have been feruling?
must you have been feruling?
must they have been feruling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I ferule?
mustn't you ferule?
mustn't she ferule?
mustn't we ferule?
mustn't you ferule?
mustn't they ferule? 	mustn't I be feruling?
mustn't you be feruling?
mustn't she be feruling?
mustn't we be feruling?
mustn't you be feruling?
mustn't they be feruling? 	mustn't I have feruled?
mustn't you have feruled?
mustn't she have feruled?
mustn't we have feruled?
mustn't you have feruled?
mustn't they have feruled? 	mustn't I have been feruling?
mustn't you have been feruling?
mustn't she have been feruling?
mustn't we have been feruling?
mustn't you have been feruling?
mustn't they have been feruling?