The cat sat _on the mat_**.
* Prepositional phrase: _on the mat_
* Preposition: _on_
* Object of the preposition: _the mat_
The prepositional phrase acts as an adverbial phrase in this sentence, modifying the verb "sat" by telling us where the cat sat.
Here are some other examples:
* The book is _under the table_**.
* I went _to the store_ for milk.
* He walked _around the block_**.
* She hid _behind the curtain_**.
Let me know if you'd like more examples! 😊