* Preposition: This is the most common use, indicating position or direction above something.
* Example: The bird flew over the house.
* Adverb: Indicating excess, completion, or beyond a limit.
* Example: He's over 40. (Excess)
* Example: The game is over. (Completion)
* Example: I looked over the fence. (Beyond a limit)
* Adjective: Indicating something that has ended or finished.
* Example: The game is over. (Finished)
It's important to consider the context of the sentence to determine the correct part of speech.