must prefix
Verbe régulier : prefix - prefixed- prefixed
Traduction française : préfixer 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must prefix
you must prefix
he must prefix
we must prefix
you must prefix
they must prefix 	I must be prefixing
you must be prefixing
he must be prefixing
we must be prefixing
you must be prefixing
they must be prefixing	I must have prefixed
you must have prefixed
he must have prefixed
we must have prefixed
you must have prefixed
they must have prefixed	I must have been prefixing
you must have been prefixing
he must have been prefixing
we must have been prefixing
you must have been prefixing
they must have been prefixing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not prefix
you must not prefix
he must not prefix
we must not prefix
you must not prefix
they must not prefix 	I must not be prefixing
you must not be prefixing
he must not be prefixing
we must not be prefixing
you must not be prefixing
they must not be prefixing	I must not have prefixed
you must not have prefixed
he must not have prefixed
we must not have prefixed
you must not have prefixed
they must not have prefixed	I must not have been prefixing
you must not have been prefixing
he must not have been prefixing
we must not have been prefixing
you must not have been prefixing
they must not have been prefixing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I prefix?
must you prefix?
must he prefix?
must we prefix?
must you prefix?
must they prefix? 	must I be prefixing?
must you be prefixing?
must he be prefixing?
must we be prefixing?
must you be prefixing?
must they be prefixing? 	must I have prefixed?
must you have prefixed?
must he have prefixed?
must we have prefixed?
must you have prefixed?
must they have prefixed? 	must I have been prefixing?
must you have been prefixing?
must he have been prefixing?
must we have been prefixing?
must you have been prefixing?
must they have been prefixing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not prefix?
must you not prefix?
must he not prefix?
must we not prefix?
must you not prefix?
must they not prefix? 	must I not be prefixing?
must you not be prefixing?
must he not be prefixing?
must we not be prefixing?
must you not be prefixing?
must they not be prefixing? 	must I not have prefixed?
must you not have prefixed?
must he not have prefixed?
must we not have prefixed?
must you not have prefixed?
must they not have prefixed? 	must I not have been prefixing?
must you not have been prefixing?
must he not have been prefixing?
must we not have been prefixing?
must you not have been prefixing?
must they not have been prefixing?