Forming the plural of nouns

The plural form of a noun indicates more than one.

• The plural form is usually formed by adding an s or es. 
• Nouns that end in a consonant followed by a y are made plural by dropping the y and adding ies.
• Nouns that end in a vowel followed by a y are made plural by adding s.
• Nouns that end in f or fe drop the f or fe and add ves.
• Some irregular nouns have special plural forms.