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