Here are some examples:
* People: John, Mary, Queen Elizabeth II, Mr. Smith
* Places: London, Australia, Mount Everest, Central Park
* Things: Facebook, iPhone, Mona Lisa, the Eiffel Tower
Here's how they differ from common nouns:
* Common noun: A general name for a person, place, or thing. (e.g., city, mountain, painting)
* Proper noun: A specific name for a particular person, place, or thing. (e.g., New York City, Mount Fuji, The Starry Night)
Key points to remember:
* Proper nouns are always capitalized.
* Proper nouns are specific and unique.
* Common nouns are general and can refer to many things.
Let me know if you have any other questions about proper nouns!