Here is a simple sentence.
Antonia and her little sister went to the park.
“Antonia” is a noun I.e. the name of a person.
“and” is a conjunction (showing that it was not only Antonia who went to the park but her little sister too.)
“her” is a pronoun that shows that the “little sister” was Antonia’s sister and also to prevent tautology (Antonia and Antonia’s little sister.❌)
“little” is an adjective that shows that the sister is Antonia’s little one,not an older one.
“sister” is also a noun(a woman or girl in relation to other daughters and sons of her parents)
“went” is a verb, the past tense of “go”.
“to” is a preposition that shows the relationship between the nouns,verb and park.
“the” is an article.
“park” is a noun.