must muss
Verbe régulier : muss - mussed- mussed
Traduction française : friper - salir must aux modal devoir 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must muss
you must muss
she must muss
we must muss
you must muss
they must muss 	I must be mussing
you must be mussing
she must be mussing
we must be mussing
you must be mussing
they must be mussing	I must have mussed
you must have mussed
she must have mussed
we must have mussed
you must have mussed
they must have mussed	I must have been mussing
you must have been mussing
she must have been mussing
we must have been mussing
you must have been mussing
they must have been mussing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't muss
you mustn't muss
she mustn't muss
we mustn't muss
you mustn't muss
they mustn't muss 	I mustn't be mussing
you mustn't be mussing
she mustn't be mussing
we mustn't be mussing
you mustn't be mussing
they mustn't be mussing	I mustn't have mussed
you mustn't have mussed
she mustn't have mussed
we mustn't have mussed
you mustn't have mussed
they mustn't have mussed	I mustn't have been mussing
you mustn't have been mussing
she mustn't have been mussing
we mustn't have been mussing
you mustn't have been mussing
they mustn't have been mussing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I muss?
must you muss?
must she muss?
must we muss?
must you muss?
must they muss? 	must I be mussing?
must you be mussing?
must she be mussing?
must we be mussing?
must you be mussing?
must they be mussing? 	must I have mussed?
must you have mussed?
must she have mussed?
must we have mussed?
must you have mussed?
must they have mussed? 	must I have been mussing?
must you have been mussing?
must she have been mussing?
must we have been mussing?
must you have been mussing?
must they have been mussing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I muss?
mustn't you muss?
mustn't she muss?
mustn't we muss?
mustn't you muss?
mustn't they muss? 	mustn't I be mussing?
mustn't you be mussing?
mustn't she be mussing?
mustn't we be mussing?
mustn't you be mussing?
mustn't they be mussing? 	mustn't I have mussed?
mustn't you have mussed?
mustn't she have mussed?
mustn't we have mussed?
mustn't you have mussed?
mustn't they have mussed? 	mustn't I have been mussing?
mustn't you have been mussing?
mustn't she have been mussing?
mustn't we have been mussing?
mustn't you have been mussing?
mustn't they have been mussing?