This document covers several topics related to phonology and language functions:
Phonology is the study of sounds. Phonemes are the smallest units of sound that distinguish words. Words and sentences have stress patterns. Intonation involves varying pitch to convey meaning.
Language has different functions like greeting, clarifying, and context. The level of formality used depends on the situation. Appropriateness is key. Coursebooks in the 1980s focused on language functions based on the Functional Approach to emphasize communication.