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 mustn't rarefy you mustn't rarefy he mustn't rarefy we mustn't rarefy you mustn't rarefy they mustn't rarefy	I mustn't be rarefying you mustn't be rarefying he mustn't be rarefying we mustn't be rarefying you mustn't be rarefying they mustn't be rarefying
Perfect	V-ing perfect
I mustn't have rarefied you mustn't have rarefied he mustn't have rarefied we mustn't have rarefied you mustn't have rarefied they mustn't have rarefied	I mustn't have been rarefying you mustn't have been rarefying he mustn't have been rarefying we mustn't have been rarefying you mustn't have been rarefying they mustn't 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
mustn't I rarefy? mustn't you rarefy? mustn't he rarefy? mustn't we rarefy? mustn't you rarefy? mustn't they rarefy?	mustn't I be rarefying? mustn't you be rarefying? mustn't he be rarefying? mustn't we be rarefying? mustn't you be rarefying? mustn't they be rarefying?
Perfect	V-ing perfect
mustn't I have rarefied? mustn't you have rarefied? mustn't he have rarefied? mustn't we have rarefied? mustn't you have rarefied? mustn't they have rarefied?	mustn't I have been rarefying? mustn't you have been rarefying? mustn't he have been rarefying? mustn't we have been rarefying? mustn't you have been rarefying? mustn't they have been rarefying?