In typical language development, at what age do a variety of word classes and sentence types emerge?

• A. Preschool
• B. Adolescent
• C. Toddler
• D. School-age

Answer: (A)

Expansion of grammar and variety of word classes and sentence types happens during the preschool years. By about ages 3 to 5, children move beyond simple noun-verb combinations and start using a wider range of word classes—adjectives, prepositions, pronouns, and more varied verbs. They also produce different sentence types: questions (including wh- and yes/no questions), negations, imperatives, and longer, more complex sentences that link clauses with conjunctions. This growth reflects the rapid development of syntactic and morphological skills that characterize the preschool period. Toddlers mainly show basic word combos, while adolescence and school-age bring further refinement, but the broad emergence of diverse word classes and sentence types is typical of preschool.