* Adverb: This is the most common usage. It modifies a verb, adjective, or another adverb, indicating time, manner, or degree.
* Example: "I just finished my homework." (modifying the verb "finished")
* Adjective: Used to describe something as fair, honest, or right.
* Example: "It's a just decision."
* Conjunction: Used to connect two clauses and indicate a contrast.
* Example: "He was wrong, just as I thought."
To determine the part of speech, look at its function in the sentence.