This document discusses expanding sentences through noun modification. It defines modifiers as words that describe, limit, or qualify nouns. Sentences can be expanded by adding different types of modifiers to nouns, including words, phrases, and clauses. The document also categorizes common kinds of noun modifiers such as descriptive adjectives, limiting adjectives, possessive adjectives, numerical adjectives, demonstrative adjectives, and indefinite adjectives. Examples are provided for each along with activities to identify these modifiers in sentences.