Plurals - The Free Dictionary
https://www.thefreedictionary.com/Plurals.htmPlurals of nouns are used to indicate when there is more than one person, place, animal, or thing. The normal method for making nouns plural is to add an “-s” at the end of the noun. For example: one boy – two boys one girl – two girls one pen – two pens one pencil – two pencils one prize – two prizes one price – two prices
English plurals - Wikipedia
https://en.wikipedia.org/wiki/English_pluralsThe plural morpheme in English is a sibilant suffixed to the end of most nouns. Regular English plurals fall into three classes, depending upon the sound that ends the singular form: In English, there are six sibilant consonants, namely /s z ʃ ʒ tʃ dʒ/. Where a singular noun ends in a sibilant sound, the plural is formed by adding /ɪz/ or /əz/ (in some transcription systems, this is abbreviated as /ᵻz/). The spelling adds -es, or -s if the singular already ends in -e: