Singular & Plural Nouns — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each word by the plural rule it follows.
Change y to ies
babypuppyflycity Just add s
boydaykeytoy When a consonant comes before y, the y becomes i and we add -es. When a vowel comes before y, we only add -s.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. One baby, two babies.
Change y to i and add -es when a consonant is before y.
2. One fly, many flies.
Consonant + y becomes ies, so fly becomes flies.
3. One boy, three boys.
Vowel + y keeps the y and just adds -s.
4. One day, seven days.
Vowel + y keeps the y, so day becomes days.
5. One puppy, five cute puppies.
Consonant + y becomes ies, so puppy becomes puppies.
Part C: True or False?
Read each statement. Circle True or False.
1. The plural of city is cities.
True False
Consonant + y changes to ies, so cities is correct.
2. The plural of key is kies.
True False
Vowel + y keeps the y, so the correct plural is keys.
3. The plural of toy is toys.
True False
Vowel + y just adds -s, so toys is correct.
4. The plural of story is storys.
True False
Consonant + y becomes ies, so the correct plural is stories.