Examples:
* He went to the store. (He replaces a previously mentioned noun, like "John")
* They are coming over for dinner. (They replaces a noun phrase, like "My friends")
* It is a beautiful day. (It replaces a noun phrase, like "The weather")
Types of Pronouns:
* Personal pronouns: Refer to specific people or things (e.g., I, you, he, she, it, we, they)
* Possessive pronouns: Show ownership (e.g., mine, yours, his, hers, its, ours, theirs)
* Reflexive pronouns: Refer back to the subject of the sentence (e.g., myself, yourself, himself, herself, itself, ourselves, yourselves, themselves)
* Demonstrative pronouns: Point to specific things (e.g., this, that, these, those)
* Interrogative pronouns: Used in questions (e.g., who, what, which, whom, whose)
* Relative pronouns: Introduce relative clauses (e.g., who, whom, whose, which, that)
* Indefinite pronouns: Refer to nonspecific people or things (e.g., someone, anyone, nobody, everything, nothing)
In essence, pronouns are powerful tools that help us avoid repeating nouns and make our writing more concise and flowing.