must rarefy
Verbe régulier : rarefy - rarefied- rarefied
Traduction française : raréfier - se raréfier 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must rarefy
you must rarefy
she must rarefy
we must rarefy
you must rarefy
they must rarefy 	I must be rarefying
you must be rarefying
she must be rarefying
we must be rarefying
you must be rarefying
they must be rarefying	I must have rarefied
you must have rarefied
she must have rarefied
we must have rarefied
you must have rarefied
they must have rarefied	I must have been rarefying
you must have been rarefying
she must have been rarefying
we must have been rarefying
you must have been rarefying
they must have been rarefying	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not rarefy
you must not rarefy
she must not rarefy
we must not rarefy
you must not rarefy
they must not rarefy 	I must not be rarefying
you must not be rarefying
she must not be rarefying
we must not be rarefying
you must not be rarefying
they must not be rarefying	I must not have rarefied
you must not have rarefied
she must not have rarefied
we must not have rarefied
you must not have rarefied
they must not have rarefied	I must not have been rarefying
you must not have been rarefying
she must not have been rarefying
we must not have been rarefying
you must not have been rarefying
they must not have been rarefying	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I rarefy?
must you rarefy?
must she rarefy?
must we rarefy?
must you rarefy?
must they rarefy? 	must I be rarefying?
must you be rarefying?
must she be rarefying?
must we be rarefying?
must you be rarefying?
must they be rarefying? 	must I have rarefied?
must you have rarefied?
must she have rarefied?
must we have rarefied?
must you have rarefied?
must they have rarefied? 	must I have been rarefying?
must you have been rarefying?
must she have been rarefying?
must we have been rarefying?
must you have been rarefying?
must they have been rarefying? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not rarefy?
must you not rarefy?
must she not rarefy?
must we not rarefy?
must you not rarefy?
must they not rarefy? 	must I not be rarefying?
must you not be rarefying?
must she not be rarefying?
must we not be rarefying?
must you not be rarefying?
must they not be rarefying? 	must I not have rarefied?
must you not have rarefied?
must she not have rarefied?
must we not have rarefied?
must you not have rarefied?
must they not have rarefied? 	must I not have been rarefying?
must you not have been rarefying?
must she not have been rarefying?
must we not have been rarefying?
must you not have been rarefying?
must they not have been rarefying?