adjective
Definition: Referring to a time that has already happened or something that existed before now.
Example: She often thinks about her past experiences and how they shaped her life.
adverb
Definition: In a way that indicates movement beyond a certain point or location.
Example: She walked past the store without noticing it.
noun
Definition: The time that has already happened, before now.
Example: She often reflects on her past and the choices she made.
preposition
Definition: This word is used to indicate a position or time that is beyond a certain point, either in space or in time.
Example: They walked past the memorial in silence.