* As a noun: "My fellow students and I are working on a group project."
* As an adjective: "We all gathered at the local pub for a fellowship meal."
* In a formal context: "The board welcomed the fellow to their meeting."
* In a casual context: "Hey fellow coffee lover, want to grab a latte?"
* As a synonym for "guy" or "man": "That fellow over there keeps staring at me."
Let me know if you'd like to see more examples!