Regular nouns: (-s)To make regular nouns plural:
add ‑s to the end.
Examples:
a cat – two cats
a dog - two dogs
a house – two houses
Regular nouns: (-es) "hissing sound"
If the singular noun ends in: ‑s, -ss, -sh, -ch, -x, or -z, add ‑es to the end to make it plural.
Examples:
a bus – two buses
a brush - two brushes
a watch – two watches
a lunch – two lunches
a box – two boxes