English Vowels, Diphthongs and Consonants
English Vowels, Diphthongs and Consonants
This topic classifies the 44 sounds and gives 2 questions. The classification looks intimidating but rests on three questions for vowels and three for consonants, and the answers to those six questions describe every sound in the language.
Classifying Vowels
A vowel is produced with no obstruction of the airstream. Three features describe every one.
| Feature | Question | Values |
|---|---|---|
| Height | How high is the tongue? | Close, mid, open |
| Backness | Which part of the tongue is raised? | Front, central, back |
| Lip rounding | Are the lips rounded? | Rounded or unrounded |
So the vowel in see is close, front and unrounded, while the vowel in too is close, back and rounded. Vowels are also long or short, marked with a length symbol, and the pair in ship and sheep differs in both length and quality — which is why Indian learners who change only the length are still heard as saying the wrong word.
Diphthongs
A diphthong is a glide from one vowel to another within a single syllable. English has eight, and they divide into two families.
- Closing diphthongs, gliding towards a close vowel — as in day, my, boy, go, now.
- Centring diphthongs, gliding towards the central vowel — as in here, there, poor.
- A triphthong glides through three vowel positions, as in fire and hour.
Diphthongs are the sounds Indian speakers most often flatten into pure vowels, saying a single steady vowel in go or day where English glides. A question may ask you to identify which word contains a diphthong, and the answer depends on recognising the glide rather than the spelling.
✗ The vowel in go is a pure vowel | ✓ It is a diphthong — the sound glides from one position to another
Classifying Consonants
A consonant involves some obstruction of the airstream. Three features describe every one.
| Feature | Question | Values |
|---|---|---|
| Voicing | Do the vocal cords vibrate? | Voiced or voiceless |
| Place of articulation | Where is the obstruction? | Bilabial, labio-dental, dental, alveolar, palatal, velar, glottal |
| Manner of articulation | How is the air released? | Plosive, fricative, affricate, nasal, lateral, approximant |
Each consonant is named by all three: /p/ is a voiceless bilabial plosive and /z/ is a voiced alveolar fricative. Questions give the three-part description and ask for the sound, or the reverse.
The Manner Groups
- Plosives stop the air completely, then release it — /p b t d k g/.
- Fricatives force air through a narrow gap — /f v s z/ and the th sounds.
- Affricates begin as a plosive and release as a fricative — the sounds in church and judge.
- Nasals release air through the nose — /m n/ and the sound at the end of sing.
- Lateral — /l/, with air passing round the sides of the tongue.
- Approximants — /r j w/, where the articulators come close without touching.
The affricates are the group most often missed, because they behave like two sounds but count as one phoneme. The sounds at the start of church and judge are the only two in English.
स्वर में रुकावट नहीं, व्यंजन में रुकावट होती है।
TRE pointer: Questions here almost always take the form of a three-part description — voiceless bilabial plosive, voiced alveolar fricative — matched to a sound, or a word matched to the number of its phonemes. Learn the three features for vowels and the three for consonants, and every such question becomes answerable by construction rather than by memory. The eight diphthongs and the two affricates are the specific counts to know.
60-Second Recap
- Vowels are described by tongue height, backness and lip rounding.
- English has 12 pure vowels and 8 diphthongs; a triphthong glides through three positions.
- Ship and sheep differ in quality as well as length.
- Consonants are described by voicing, place and manner of articulation.
- /p/ is a voiceless bilabial plosive; /z/ is a voiced alveolar fricative.
- The only two English affricates are the sounds in church and judge.
Frequently Asked Questions
What is a diphthong?
A vowel sound that glides from one position to another within a single syllable, as in day, my, go and now. English has eight of them. A triphthong glides through three positions, as in fire and hour, and is less commonly asked.
How is a consonant described in phonetics?
By three features together: whether the vocal cords vibrate, where the obstruction occurs, and how the air is released. So /p/ is a voiceless bilabial plosive and /z/ is a voiced alveolar fricative. Questions give this description and ask for the sound.
Which sounds are affricates in English?
Only two: the sounds at the beginning of church and judge. An affricate begins as a plosive, with the air completely stopped, and releases as a fricative. It is often missed because it feels like two sounds but counts as a single phoneme.
Why do Indian speakers confuse ship and sheep?
Because the two vowels differ in quality as well as in length, and many Indian speakers change only the length. The vowel of sheep is closer and more front than that of ship, so lengthening the wrong vowel does not produce the right word.