Preposition: This is the most common usage. "Over" indicates position or direction above something.
* The bird flew over the house.
* He put a blanket over the sleeping child.
Adverb: "Over" can modify verbs, adjectives, or other adverbs, indicating completion, excess, or repetition.
* The game is over.
* She was overjoyed to see him.
* He read the book over and over again.
Adjective: "Over" can also describe something that is excessive or finished.
* The overripe fruit fell from the tree.
* The meeting is over for the day.
Interjection: In a few cases, "over" can express a feeling of relief or excitement.
* Over! I finally finished the puzzle.
To determine the part of speech of "over" in a sentence, look at its context and the role it plays in the sentence structure.