UNIT
Lesson 4
Date
Name
Plurals and the Prefix conMost plurals are formed by adding -s or -es.
• For words that end in a consonant and y,
change the y to / and add -es.
cherry, cherries
colony, colonies
For words that end in a vowel and y, just add -s.
key, keys
For some words that end in f or fe, change the f or
fe to v and add -es.
wife, wives
calf, calves
For most words that end in a consonant and o, you
add -es.
potato, potatoes
radio, radios
For words that end in o preceded by a vowel, just
add -s.
scratch, scratches
For words that end in s, z, ch, sh, or x, just add -es.
Many words feature the prefix con-. This prefix is from the Latin
meaning "with, join, or together."
Connect = to join with, or establish communication with
Conspire = to join with another person or group sharing a common goal
Practice
Complete the following list by filling in the blanks with the
correct singular or plural form of each word. Circle the words
that contain the prefix con-.
Singular
1.
Plural
6.
month
2.
confederations
Plural
ideas
7. wish
8. boss
3. consequence
4. fox
5.
Singular
. conjunction
citizens
Skills Practice 1 • Word Structure
10.
heroes
UNIT 3 • Lesson 4