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We often have two vowels used in the same syllable as a single sound, as ou in round, oi in oil, etc.

A diphthong is a union of two vowels to represent a single sound different from that of either alone.

Sometimes we have two vowels used together in a combination which is really not a diphthong for they do not unite in a different sound. Only one of the vowels is used and the other is silent as ai in rain, oa in soap, etc.

The most common diphthongs are:

ou as in sound.

ow as in owl.

oi as in oil.

oy as in boy.

In the spelling lesson for this week mark the words in which the combination of vowels forms a diphthong. In some of the words the combination of vowels does not form a diphthong for only one of the vowels is sounded. Draw a line through the silent letter.

Monday

Straight

Aisle

Search

Breadth

Defeat

Tuesday

Exploit

Ceiling

Height

People

Feudal

Wednesday

Brought

Shoulder

Group

Compound

Trouble

Thursday

Royal

Coarse

Course

Broad

Flower

Friday

Laughter

Haunted

Plaid

Invoice

Chair

Saturday

Guide

Build

Grieve

Sieve

Renown