Form plurals of nouns ending in f, fe, o and y

Key Notes:

Nouns Ending in “f” or “fe”

• Rule: Most nouns ending in “f” or “fe” form their plurals by changing the “f” or “fe” to “ves.”
• Examples:
  • Leaf → Leaves
  • Wolf → Wolves
  • Knife → Knives
• Exceptions: Some nouns simply add “s” to form the plural.
  • Roof → Roofs
  • Chief → Chiefs

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Nouns Ending in “o”

• Rule 1: For many nouns ending in “o,” add “es” to form the plural.
  • Tomato → Tomatoes
  • Potato → Potatoes
• Rule 2: For some nouns ending in “o,” add “s” to form the plural.
  • Photo → Photos
  • Piano → Pianos
• Tip: Common nouns that are related to music or technology (e.g., pianos, radios) usually just add “s.”

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Nouns Ending in “y”

• Rule: If a noun ends in a consonant + “y,” change the “y” to “i” and add “es.”
  • Baby → Babies
  • City → Cities
• Exception: If a noun ends in a vowel + “y,” simply add “s.”
  • Boy → Boys
  • Key → Keys