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
he must muss
we must muss
you must muss
they must muss 	I must be mussing
you must be mussing
he must be mussing
we must be mussing
you must be mussing
they must be mussing	I must have mussed
you must have mussed
he 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
he 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 must not muss
you must not muss
he must not muss
we must not muss
you must not muss
they must not muss 	I must not be mussing
you must not be mussing
he must not be mussing
we must not be mussing
you must not be mussing
they must not be mussing	I must not have mussed
you must not have mussed
he must not have mussed
we must not have mussed
you must not have mussed
they must not have mussed	I must not have been mussing
you must not have been mussing
he must not have been mussing
we must not have been mussing
you must not have been mussing
they must not have been mussing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I muss?
must you muss?
must he muss?
must we muss?
must you muss?
must they muss? 	must I be mussing?
must you be mussing?
must he be mussing?
must we be mussing?
must you be mussing?
must they be mussing? 	must I have mussed?
must you have mussed?
must he 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 he 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 	
must I not muss?
must you not muss?
must he not muss?
must we not muss?
must you not muss?
must they not muss? 	must I not be mussing?
must you not be mussing?
must he not be mussing?
must we not be mussing?
must you not be mussing?
must they not be mussing? 	must I not have mussed?
must you not have mussed?
must he not have mussed?
must we not have mussed?
must you not have mussed?
must they not have mussed? 	must I not have been mussing?
must you not have been mussing?
must he not have been mussing?
must we not have been mussing?
must you not have been mussing?
must they not have been mussing?