Have you ever noticed that the words coin, house and boy contain sounds that seem to glide from one vowel sound to another?
These special sounds are called diphthongs. They are common in English and appear in many everyday words. Learning to recognise and pronounce diphthongs will help you become a more fluent reader and a more confident speaker.
In this lesson, you’ll discover what diphthongs are, how they sound and how to identify them in words.
🎯 What You’ll Learn
By the end of this lesson, you should be able to:
- explain what a diphthong is.
- identify common diphthongs in words.
- pronounce words containing diphthongs correctly.
- improve your reading and speaking through accurate pronunciation.
💡 Let’s Explore
What Is a Diphthong?
A diphthong is a single speech sound made by smoothly gliding from one vowel sound to another within the same syllable.
Instead of making just one vowel sound, your mouth moves as you pronounce the sound.
Common Diphthongs
| Diphthong | Example Words |
|---|---|
| oi | coin, boil, join, voice |
| oy | boy, toy, enjoy, royal |
| ou | house, cloud, shout, proud |
| ow | cow, flower, brown, owl |
| ai | rain, train, paint, snail |
| ay | day, play, stay, holiday |
Read each word aloud and listen to how the vowel sound changes as you pronounce it.
Listening for Diphthongs
Look at these words:
- coin
- toy
- house
- flower
- train
- play
Each word contains a vowel sound that glides smoothly instead of staying the same.
Recognising these sounds helps you pronounce words more naturally.
Comparing Similar Words
Notice the difference.
| Word | Diphthong |
|---|---|
| coin | oi |
| boy | oy |
| cloud | ou |
| brown | ow |
| rain | ai |
| play | ay |
Although some diphthongs produce similar sounds, they are often spelled differently.
🌟 Example
Read the sentence.
The boy found a shiny coin near the playground after the rain.
The words containing diphthongs are:
- boy (oy)
- coin (oi)
- playground (ay)
- rain (ai)
Reading these words correctly makes the sentence sound smooth and natural.
🌍 Real-Life Example
During a reading lesson, Maya came across the sentence:
“The proud boy watched the brown owl fly over the house.”
She recognised the diphthongs:
- ou in proud and house
- ow in brown
- oy in boy
Because she knew these vowel patterns, she read the sentence confidently without stopping.
💡 Tips for Learning Diphthongs
✔ Listen carefully to how words are pronounced.
✔ Read aloud every day.
✔ Practise words with the same diphthong together.
✔ Notice vowel patterns while reading.
✔ Use new words in conversations and writing.
✨ Quick Tips
🔤 A diphthong is one sound made by gliding between two vowel sounds.
👂 Listen carefully to how the vowel changes.
📖 Reading aloud improves pronunciation.
🌟 The more you practise, the more natural your speech becomes.
🎯 Let’s Practise!
A. Choose the Correct Answer
1. What is a diphthong?
A. Two consonants making one sound.
B. A silent letter in a word.
C. One speech sound formed by gliding from one vowel sound to another.
D. A group of words with the same meaning.
2. Which word contains the oi diphthong?
A. Boy
B. Coin
C. House
D. Rain
3. Which word contains the ou diphthong?
A. Cloud
B. Play
C. Toy
D. Chair
B. True or False
4. The words boy and toy contain the same diphthong.
5. Reading words aloud can help improve your pronunciation of diphthongs.
C. Short Answer
6. What is a diphthong?
7. Write two words for each of the following diphthongs:
- oi
- oy
- ou
- ay
8. Read the sentence below and list all the words that contain diphthongs.
“The boy enjoyed playing outside after the rain because the weather was bright and the ground was dry.”
Answers: 1 C 2 B 3 A 4 T 5 T