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