English verb conjugation
MUST RAREFY

Regular verb: rarefy - rarefied - rarefied

Affirmation

Simple form	V-ing form
I must rarefy you must rarefy he must rarefy we must rarefy you must rarefy they must rarefy	I must be rarefying you must be rarefying he must be rarefying we must be rarefying you must be rarefying they must be rarefying
Perfect	V-ing perfect
I must have rarefied you must have rarefied he 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 he must have been rarefying we must have been rarefying you must have been rarefying they must have been rarefying

Negation

Simple form	V-ing form
I must not rarefy you must not rarefy he 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 he must not be rarefying we must not be rarefying you must not be rarefying they must not be rarefying
Perfect	V-ing perfect
I must not have rarefied you must not have rarefied he 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 he must not have been rarefying we must not have been rarefying you must not have been rarefying they must not have been rarefying

Interrogative form

Simple form	V-ing form
must I rarefy? must you rarefy? must he rarefy? must we rarefy? must you rarefy? must they rarefy?	must I be rarefying? must you be rarefying? must he be rarefying? must we be rarefying? must you be rarefying? must they be rarefying?
Perfect	V-ing perfect
must I have rarefied? must you have rarefied? must he 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 he have been rarefying? must we have been rarefying? must you have been rarefying? must they have been rarefying?

Interro-negative form

Simple form	V-ing form
must I not rarefy? must you not rarefy? must he 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 he not be rarefying? must we not be rarefying? must you not be rarefying? must they not be rarefying?
Perfect	V-ing perfect
must I not have rarefied? must you not have rarefied? must he 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 he not have been rarefying? must we not have been rarefying? must you not have been rarefying? must they not have been rarefying?