Singular and Plural Nouns

1) Basic Rule: Add –s

The most common way to form plurals is simply to add -s to the end of the noun.

2) Add –es for Nouns Ending in s, x, z, ch, sh

Use -es for words ending in hissing sounds like s, x, z, ch, and sh.

3) Irregular Plurals

Some plural forms are irregular and do not follow a clear pattern.

4) Change –f or –fe to –ves

For nouns ending in -f or -fe, change the ending to -ves.

Exceptions

Some nouns ending in -f simply add -s.

5) Nouns Ending in -o

Consonant + o → add -es

*Note: For the dual options above, adding -es is more common, but -s is also acceptable.

Vowel + o → add -s

Exceptions (Consonant + o → add -s)

Either -s or -es (both correct, -s more common)

6) Nouns Ending in –y

Consonant + y → change y to -ies

Vowel + y → add -s

7) Unchanging Plural Nouns (Invariable Nouns)

Some nouns have the exact same form in both singular and plural.

8) Plural-Only Nouns

Some nouns exist only in the plural form, even when referring to a single item.