General Rule:
* Most nouns ending in "f" or "fe" change the "f" to "ves" to form the plural.
Examples:
* Leaf - Leaves
* Knife - Knives
* Life - Lives
* Wife - Wives
* Wolf - Wolves
* Chief - Chiefs
Exceptions:
* Some nouns ending in "f" or "fe" simply add "s" to form the plural.
* Beliefs
* Proofs
* Roofs
* Safes
* Others have irregular plurals:
* Hoof - Hooves
* Scarf - Scarves
* Dwarf - Dwarves
Tips:
* If you're unsure, always check a dictionary.
* Pay attention to the sound of the plural form. If it's pronounced with a "vz" sound, it likely follows the "ves" rule.
Let me know if you have any more questions!