Overview
Generally, making plurals (more than 1 of something) is very easy in English.
Plural Formation
For almost all nouns we form the plural by adding s. * I have an apple * I have 5 apples. For nouns which end with the letter y we form the plural by removing the y and adding ies. * I have a fly * I have 5 flies. For nouns which end with the letter s (dress), ch (beach), x (box), sh (bush) or z (quiz), we form the plural by adding es. * I have a bus. * I have 5 buses.
Irregular Noun Plural Formation
There are also a small number of nouns which are irregular. The first word in the following list is the singular form and the second word is the plural form: * child - children * man - men * woman - women * foot - feet * tooth - teeth * goose - geese * mouse - mice * fish - fish * sheep - sheep * deer - deer * advice - advice * information - information * data - data As you can see, with some words there is no change to form the plural. The plural form and the singular form are exactly the same.