Cases of word usage

1) something out of date either now or in a description of past events (anachronism)

2) past form of can (could)

3) (used with the past participle of another verb (e.g. moved, done) to form) a: the present perfect tense, b: the past perfect tense, c: the future perfect tense, d: the perfect conditional tense (have)

4) (the study of) the branch of knowledge dealing with the past events of a country, a continent or the world (history)

5) knowledge, especially from the past or possessed by a class of people (lore)

6) (used to tell a person about a present or past duty or obligation) (used to express an opinion, give advice etc about the present or past) (ought)

7) a person who walks past a person, place etc in the street (passerby)

8) a medical examination made after death; a review of an event etc in the past (postmortem)

9) something that belonged to a saint, kept as an object of reverence; something from the past that keeps memories alive (relic)

10) to talk or write about past events and experiences (reminisce)