How do you know whether a noun is singular or plural?

In this lesson you will learn how to form irregular plural nouns by asking yourself if the noun sounds right in the sentence.

Let’s Review PersonPlaceThing

A Common Mistake man mansmanes men ✕✕

Core Lesson 1 Singular Plural 2+

Sound?

Two fishes swam in the blue pond. Two fish swam in the blue pond. ✓

Rule Some nouns do not change from singular to plural. Rule Some nouns do not change from singular to plural.

Core Lesson The cat had nine lifes. The cat had nine lives. ✓

Rule For nouns that end in –f or –fe, change the –f to a –v and add -es. Rule For nouns that end in –f or –fe, change the –f to a –v and add -es.

Core Lesson The gooses laid golden eggs. The geese laid golden eggs. ✓

Rule Some nouns change spelling to form plural. Rule Some nouns change spelling to form plural.

In this lesson you have learned how to form irregular plural nouns by asking yourself if the noun sounds right in the sentence.

Guided Practice Circle the correct form of the plural noun in the sentence. Five women/womans meet for dinner. Three deers/deer roam in the meadow.

Circle the correct form of the plural noun in the sentence. The set has ten knifes/knives. Two mice/mouses race for the cheese.

Extension Activities While reading, try to find irregular plural nouns in your book. Write the nouns down on paper and categorize them by their rule.

Write a pair of sentences that show one of the rules for forming irregular plural nouns. Use the correct form in one sentence and an incorrect form of the noun in the other. Ask a partner to figure out which sentence is correct.

Quick Quiz Circle the correct form of the plural noun in the sentence. The childs/children play outside. Amy has four pet fish/fishes.