English verb conjugation
MUST POSSESS

Regular verb: possess - possessed - possessed

Affirmation

Simple form	V-ing form
I must possess you must possess he must possess we must possess you must possess they must possess	I must be possessing you must be possessing he must be possessing we must be possessing you must be possessing they must be possessing
Perfect	V-ing perfect
I must have possessed you must have possessed he must have possessed we must have possessed you must have possessed they must have possessed	I must have been possessing you must have been possessing he must have been possessing we must have been possessing you must have been possessing they must have been possessing

Negation

Simple form	V-ing form
I must not possess you must not possess he must not possess we must not possess you must not possess they must not possess	I must not be possessing you must not be possessing he must not be possessing we must not be possessing you must not be possessing they must not be possessing
Perfect	V-ing perfect
I must not have possessed you must not have possessed he must not have possessed we must not have possessed you must not have possessed they must not have possessed	I must not have been possessing you must not have been possessing he must not have been possessing we must not have been possessing you must not have been possessing they must not have been possessing

Interrogative form

Simple form	V-ing form
must I possess? must you possess? must he possess? must we possess? must you possess? must they possess?	must I be possessing? must you be possessing? must he be possessing? must we be possessing? must you be possessing? must they be possessing?
Perfect	V-ing perfect
must I have possessed? must you have possessed? must he have possessed? must we have possessed? must you have possessed? must they have possessed?	must I have been possessing? must you have been possessing? must he have been possessing? must we have been possessing? must you have been possessing? must they have been possessing?

Interro-negative form

Simple form	V-ing form
must I not possess? must you not possess? must he not possess? must we not possess? must you not possess? must they not possess?	must I not be possessing? must you not be possessing? must he not be possessing? must we not be possessing? must you not be possessing? must they not be possessing?
Perfect	V-ing perfect
must I not have possessed? must you not have possessed? must he not have possessed? must we not have possessed? must you not have possessed? must they not have possessed?	must I not have been possessing? must you not have been possessing? must he not have been possessing? must we not have been possessing? must you not have been possessing? must they not have been possessing?