Spelling of plurals: when to add ‘s’ or ‘es’

In English, we mostly form the plural of a noun by adding ‘s’. However, in some cases we add ‘es’.

On this page we look at when to add ‘s’ and when to add ‘es’. We will also look at the pronunciation of ‘s’ and ‘es’.

When to add ‘s’:

The general rule for making a word plural is to add ‘s’:

  • 1 dog, 2 dogs, 3 dogs
  • 1 town, 2 towns, 3 towns
  • 1 book, 2 books, 3 books.

When to add ‘es’

1. When the singular form ends in -s or -ss:

  • 1 bus, 2 buses
  • 1 kiss, 2 kisses
  • 1 class, 2 classes
  • 1 business, 2 businesses.

2. When the singular form ends in -x:

  • 1 fox, 2 foxes
  • 1 box, 2 boxes
  • a reflex, all reflexes.

3. When the singular form ends in -ch:

  • 1 church, 2 churches
  • 1 witch, 2 witches.

4. When the singular form ends in -sh:

  • 1 dish, 2 dishes
  • 1 bush, 2 bushes.

Pronunciation of ‘s’ and ‘es’

At the end of a word, we can pronounce ‘s’ as /s/ or /z/.

1. After the following sounds we pronounce ‘s’ as /s/:

2. In all other cases we pronounce ‘s’ as /z/:

When we add ‘es’ the pronunciation is always /iz/:

Hear more examples of pronunciation in our Pronunciation section.


  1. Noeline fernando - September 17, 2015, 2:28 pm Reply

    Thanks a lot it helps us to learn the proper reason to understand the reason why we do right it this way

  2. Adetola waziri - September 25, 2015, 6:08 am Reply

    I love your page… It’s well stated and very explanatory…

  3. kamran - September 27, 2015, 2:45 pm Reply

    why sites don’t say anything about “o” ending. For example: potato-potatoes, tomato-tomatoes

    • Anonymous - April 28, 2016, 6:48 pm Reply

      was just going to ask the same…logos, silos, casinos, avocados…no e

      • Anonymous - June 17, 2016, 6:44 pm Reply

        Ad es to all then will be plural nouns

  4. ngozi - October 1, 2015, 9:23 pm Reply

    It’s educating.

    • Anonymous - May 6, 2016, 6:16 am Reply

      hey how about f so wolf is wolves and about adding ies like flies but not if there is a vowel before it

  5. Kamal - July 24, 2016, 1:47 am Reply

    It’s a v helpful site. You have given appropriate words with examples which is very self explanatory but one suggestion I want to add if you can give more options like words ending with “O” then it would have be amazing.

  6. Siya - July 28, 2016, 1:09 pm Reply

    why does es comes in tomato .is that right to put es to words ending with o s

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