* Subject of the sentence: The noun that performs the action of the verb.
* Example: *The cat sat on the mat.* (Cat is the subject)
* Object of the verb: The noun that receives the action of the verb.
* Example: *The girl kicked the ball.* (Ball is the object)
* Object of a preposition: The noun that follows a preposition (words like "to," "from," "on," etc.).
* Example: *The dog ran under the table.* (Table is the object of the preposition "under")
* Appositive: A noun that renames or explains another noun.
* Example: *My brother, John, is a doctor.* (John is the appositive of brother)
* Direct address: A noun used to address someone directly.
* Example: *John, can you pass me the salt?* (John is in direct address)
Remember that nouns can also be part of noun phrases, which are groups of words that function as a noun. For example, "the big red ball" is a noun phrase.
So, to find nouns in a sentence, look for words that name people, places, things, or ideas. You'll find them in various positions depending on their role in the sentence.