Vowel Diphthong Worksheets

What are Vowel Diphthongs?

English alphabets are divided into two categories. The first is that of consonants and the second one is of the vowels. There are five vowels including a, e, i, o, and u, sometimes even y is considered as a vowel. Vowel is a speech sound that is usually pronounced without any stricture in the vocal tract. When talking about vowels there is another thing that you need to know and that is vowel diphthongs. According to Wikipedia, "A diphthong, also known as a gliding vowel, is a combination of two adjacent vowel sounds within the same syllable." Vowel diphthongs are usually known as 'the sliding vowels,' or the 'gliding vowels.' Diphthong is a Greek word that means 'two sounds.' These can contain one to two vowels. Some examples include 'boy,' 'out,' and 'because.'

What's Missing

Write the missing letters on the lines to complete the words and thereby complete the sentences.

oi | oy

Choose a word from the box to complete each sentence.

The Vowel Sound in "Boy"

Write each word in the correct column.

oi | oy

Fill in the missing letters in each word. Use oy or oi.

As in Prawn

Write each word in the correct column.

OO or oo

Do these sound like look or fool.

Cut and Match

Cut. Glue to match. Choose from the words to complete the sentences.

au | aw

Fill in the missing letters in each word. Use au or aw.

The Race

Write three words that contain each vowel diphthong.

Drawing a Blank

What is missing in each word?

Colors That Stick

Say the name of each picture. Color the diphthong that belongs in each word.

The OO Sound: ou | oo | ue

What is missing from each of the words?

How Many?

How many more words can you think of that contain the diphthongs ai or ay? Write your words below. Then, on the back of this page, use each word in a sentence.

Recognizing Them

Find the vowel diphthong in the word. Write it in the box.

The Big Search

Fill in the blanks at the top of each column with the vowel diphthongs provided by your teacher. Read the assignment. When you find a word that contains one of the vowel diphthongs, write it in the correct column.