Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I must hairy you must hairy he must hairy we must hairy you must hairy they must hairy
V-ing form
I must be hairying you must be hairying he must be hairying we must be hairying you must be hairying they must be hairying
Perfect
I must have hairied you must have hairied he must have hairied we must have hairied you must have hairied they must have hairied
V-ing perfect
I must have been hairying you must have been hairying he must have been hairying we must have been hairying you must have been hairying they must have been hairying
Negation
Simple form
I must not hairy you must not hairy he must not hairy we must not hairy you must not hairy they must not hairy
V-ing form
I must not be hairying you must not be hairying he must not be hairying we must not be hairying you must not be hairying they must not be hairying
Perfect
I must not have hairied you must not have hairied he must not have hairied we must not have hairied you must not have hairied they must not have hairied
V-ing perfect
I must not have been hairying you must not have been hairying he must not have been hairying we must not have been hairying you must not have been hairying they must not have been hairying
Interrogative form
Simple form
must I hairy? must you hairy? must he hairy? must we hairy? must you hairy? must they hairy?
V-ing form
must I be hairying? must you be hairying? must he be hairying? must we be hairying? must you be hairying? must they be hairying?
Perfect
must I have hairied? must you have hairied? must he have hairied? must we have hairied? must you have hairied? must they have hairied?
V-ing perfect
must I have been hairying? must you have been hairying? must he have been hairying? must we have been hairying? must you have been hairying? must they have been hairying?
Interro-negative form
Simple form
must I not hairy? must you not hairy? must he not hairy? must we not hairy? must you not hairy? must they not hairy?
V-ing form
must I not be hairying? must you not be hairying? must he not be hairying? must we not be hairying? must you not be hairying? must they not be hairying?
Perfect
must I not have hairied? must you not have hairied? must he not have hairied? must we not have hairied? must you not have hairied? must they not have hairied?
V-ing perfect
must I not have been hairying? must you not have been hairying? must he not have been hairying? must we not have been hairying? must you not have been hairying? must they not have been hairying?