Count nouns: plural to singular
Count nouns can be counted, and as such, they can be singular or plural.
1 – Most singular nouns form the plural by adding «s».
2 – To make the plural of a singular noun ending in ss, x, z, ch, sh, just add «es».
3 – To make the plural of a singular noun ending in a consonant and «y», add «ies».
4 – To make the plural of a singular noun ending in a vocals and «y», add «s».
5 – One and ones can replace countable nouns to avoid repetitions, but it must be clear what you are talking about.
6 – Next, there are some irregular nouns and their plural, they have no specific rule. They can be made plural by changing the word, changing vowels, or adding a different ending.
7 – Some nouns have the same form in singular and plural.