An Introduction to Monophthongs and Diphthongs by Solomon Osuokam Ogbeh

In this lesson, we will explore the world of vowel sounds, focusing on two main types: monophthongs and diphthongs. Understanding these sounds is crucial for mastering pronunciation and enhancing your overall fluency in English.

Monophthongs

Monophthongs are single, pure vowel sounds. They are pronounced with a single, unchanging position of the tongue and mouth. English has 12 monophthongs, which can be divided into short and long vowels.

Short Vowels

1. /ɪ/ as in bit /bɪt/
• Example: Chidinma kept her kit /kɪt/ in the locker.
2. /e/ as in bet /bet/
• Example: Adeola read a text /tekst/ about Nigeria's history.
3. /æ/ as in bat /bæt/
• Example: Emeka has a new hat /hæt/ for school.
4. /ʌ/ as in but /bʌt/
• Example: Funmi loves to study /ˈstʌdi/ at the library.
5. /ɒ/ as in pot /pɒt/
• Example: Kemi cooked rice in the big pot /pɒt/.
6. /ʊ/ as in put /pʊt/
• Example: Tunde put the book /bʊk/ on the shelf.
7. /ə/ as in about /əˈbaʊt/
• Example: Ngozi wondered about the lesson /ˈlesən/ plan.

Long Vowels

1. /iː/ as in beat /biːt/
• Example: Chijioke saw a tree /triː/ in the garden.
2. /ɑː/ as in car /kɑː/
• Example: Halima parked the car /kɑː/ outside.
3. /ɔː/ as in saw /sɔː/
• Example: Biodun bought a new door /dɔː/.
4. /uː/ as in food /fuːd/
• Example: Seyi prefers to eat fruit /fruːt/ every morning.
5. /ɜː/ as in bird /bɜːd/
• Example: Kunle heard the word /wɜːd/ on the radio.

Diphthongs

Diphthongs are complex vowel sounds that begin with one vowel sound and glide into another within the same syllable. English has eight diphthongs.

1. /eɪ/ as in face /feɪs/
• Example: Adaku plays with a cane /keɪn/ in the yard.
2. /aɪ/ as in my /maɪ/
• Example: Zainab likes to fly /flaɪ/ kites.
3. /ɔɪ/ as in boy /bɔɪ/
• Example: Olu enjoys the toy /tɔɪ/ his dad bought.
4. /aʊ/ as in now /naʊ/
• Example: Ifeoma is learning how /haʊ/ to bake.
5. /əʊ/ as in go /ɡəʊ/
• Example: Chima wanted to go /ɡəʊ/ to the market.
6. /ɪə/ as in near /nɪə/
• Example: Uche is here /hɪə/ to study.
7. /eə/ as in hair /heə/
• Example: Bukola takes care of her hair /heə/ daily.
8. /ʊə/ as in tour /tʊə/
• Example: Bisi went on a tour /tʊə/ of the museum.

Practice Activities

Activity 1: Read the following sentences and identify the monophthongs. Write the phonetic transcription of the vowel sounds.

1. Nkechi has a small cat.
2. Yusuf found a red pen.
3. Amara sings beautifully.
4. John loves to cook rice.
5. Bola likes to read books.

Activity 2: Read the following sentences and identify the diphthongs. Write the phonetic transcription of the vowel sounds.

1. Ada bought a new toy.
2. Chima enjoys hiking.
3. Funmi likes to draw.
4. Halima saw a beautiful rainbow.
5. Emeka wants to fly a kite.

Understanding and correctly using monophthongs and diphthongs are essential skills for mastering English pronunciation. By practising the sounds and recognising them in words, you will improve your speaking and listening skills. Remember to practice regularly and pay attention to the way these vowel sounds are produced.