Most singular nouns are made plural by simply putting one -s in ~ the end. There are many different rules regarding pluralization relying on what letter a noun end in. Rarely often rare nouns execute not monitor plural noun rules, for this reason they have to be memorized or looked increase in the dictionary.

You are watching: The most common rule for forming plural nouns is

Plural Noun Rules

There are many plural noun rules, and because we use nouns so typically when writing, it’s essential to know every one of them! The exactly spelling of plurals usually counts on what letter the singular noun ends in.
1 come make continual nouns plural, include ‑s to the end.

cat – cats

house – houses

2 If the singular noun ends in ‑s, -ss, -sh, -ch, -x, or -z, include ‑es come the finish to make it plural.

truss – trusses

bus – buses

marsh – marshes

lunch – lunches

tax – taxes

blitz – blitzes

3 In part cases, singular nouns ending in -s or -z, call for that you dual the -s or -z prior to including the -es because that pluralization.

fez – fezzes

gas –gasses (note the gases is likewise an acceptable, and an ext commonly used, order of this plural noun)

4 If the noun ends through ‑f or ‑fe, the f is often changed to ‑ve before adding the -s to kind the plural version.

wife – wives

wolf – wolves


roof – roofs

belief – beliefs

chef – chefs

chief – chiefs

5 If a singular noun ends in ‑y and also the letter before the -y is a consonant, change the finishing to ‑ies to do the noun plural.

city – cities

puppy – puppies

6 If the singular noun ends in -y and also the letter prior to the -y is a vowel, simply add an -s to make it plural.

ray – rays

boy – boys

7 If the singular noun ends in ‑o, include ‑es to do it plural.

potato – potatoes

tomato – tomatoes


photo – photos

piano – pianos

halo – halos

With the distinct word volcano, girlfriend can use the traditional pluralization because that words that finish in -o or not. It’s her choice! Both that the following are correct:



8 If the singular noun ends in ‑us, the plural ending is generally ‑i.

cactus – cacti

focus – foci

9 If the singular noun end in ‑is, the plural ending is ‑es.

analysis – analyses

ellipsis – ellipses

10 If the singular noun end in ‑on, the plural finishing is ‑a.

phenomenon – phenomena

criterion – criteria

11 part nouns don’t readjust at all when they’re pluralized.

sheep – sheep

series – series

species – species

deer –deer

You should see this nouns in context to recognize them together singular or plural. Consider the complying with sentence:

Mark caught one fish, yet I recorded three fish.

See more: When A Girl Looks Back At You When Walking Away After We Talked?

Plural Noun Rules because that Irregular Nouns

Irregular noun follow no particular rules, therefore it’s ideal to memorize this or look up the ideal pluralization in the dictionary.