Final answer:
The most common way to form the plural of a noun is by adding "s" to the end, although some require "es," depending on the ending letters of the word.
Step-by-step explanation:
The most common way to form the plural of a noun is by adding "s" to the end of the word. However, some words require adding "es" to the end of the word. Examples include nouns ending in s, x, z, ch, or sh where you would add "es" (as in buses or foxes), and nouns that have irregular plural forms that do not follow the standard rules (such as children or people).
When discussing possession with plural nouns that end in -s, you simply add an apostrophe at the end (the three friends' cars). In cases where the plural noun does not end in -s, you would add 's to show possession (the children's game).
Understanding the rules of pluralization is important in both writing and speech to convey clear and correct information.