名词性物主代词用于表示所有关系，并且可以代替前面已经提到的名词，以避免重复。以下是使用名词性物主代词“ours”的几个例句：
1. When we went on vacation, we left our car at home and took hers instead.
2. This desk is ours, and that one is hers.
3. Ours is the best team in the league.
4. It's important to keep our personal belongings secure.
5. After the game, we realized that their team was stronger than ours.
希望这些例句能帮助你理解和使用名词性物主代词“ours”