What noun does you it they her and me replace?

You're asking about pronouns, words that stand in for nouns. They don't directly replace a noun, but instead refer to a noun that has already been mentioned or is understood from the context.

Here's how the pronouns you listed relate to nouns:

* You: Refers to the person being addressed.

* It: Refers to a singular thing or idea.

* They: Refers to multiple people or things.

* Her: Refers to a female person.

* Me: Refers to the speaker or writer.

Examples:

* You are a good friend. (You replaces the name of the person being addressed.)

* It is raining outside. (It replaces "the weather" or "the rain".)

* They went to the park. (They replaces the names of the people who went to the park.)

* Her dog is very cute. (Her replaces the name of the female person who owns the dog.)

* Me and my sister went shopping. (Me replaces the name of the speaker or writer.)