This document provides an overview of English vowels, including their classification and production. It describes the five letters used to write vowels in English and divides vowels into long and short, pure and diphthong, categories based on tongue position. Key points include:
- Vowels are produced with an unobstructed air stream and are always voiced.
- English vowels include short/long, front/central/back, open/mid/close, rounded/spread/neutral varieties.
- Diphthongs involve a transition from one vowel sound to another within a single syllable.
- Various exercises are suggested to contrast vowel pairs like [i:]-[ɪ], [eɪ]-