5. Time-specific: the relation is necessary at a specified time in the subject's life.
6. Time-indefinite: it is necessary at some unspecified time.
7. Generally absolute: the predicate actually obtains or does not obtain, without requiring necessity or permanence.
8. Generally possible: the opposite judgment is not necessary.
Time-specific and time-indefinite forms both involve necessity but differ in specification of time. The generally absolute form concerns actuality; the generally possible form concerns non-necessity of the opposite.
Always identify the proposition before classifying its modality; they are related but different questions.