1. The teacher gave him a good grade. (Him is the object of the verb "gave")
2. I saw her at the store. (Her is the object of the verb "saw")
3. They invited us to the party. (Us is the object of the verb "invited")
4. Can you tell me the answer? (Me is the object of the verb "tell")
5. The dog chased it through the park. (It is the object of the verb "chased")
6. She gave the book to them**. (Them is the object of the preposition "to")
7. I wrote a letter to you**. (You is the object of the preposition "to")
8. The cat jumped on it**. (It is the object of the preposition "on")
9. We sat between him and her**. (Him and her are objects of the preposition "between")
10. He bought a gift for her**. (Her is the object of the preposition "for")
Remember: Objective pronouns are used as the object of a verb or preposition. They receive the action of the verb or are the focus of the preposition.