Here are the plural forms of the nouns that end in "s" and don't change when added to:
Regular Plural Nouns
* cats -> cats (no change)
* buses -> buses (no change)
* radios -> radios (no change)
* pandas -> pandas (no change)
* theaters -> theaters (no change)
In general, if a noun ends in "-s", "-ss", "-x", "-z", "-ch", or "-sh", you can simply add "-es" to form the plural.
Examples:
* focuss -> focusses
* buzz -> buzzes
* crisis -> crises
* fox -> foxes
* tennis -> tennises
Irregular Plural Nouns
Some nouns don't follow the usual rules for forming plurals. Here are a few examples:
* person -> people
* mouse -> mice
* tooth -> teeth
* foot -> feet
* man -> men
Examples of Common Irregular Plurals:
* person -> people
* mouse -> mice
* tooth -> teeth
* goose -> geese
* cattle -> cattle (no change)
* deer -> deer (no change)
* sheep -> sheep (no change)
* fish -> fish (no change)
It's important to note that there are many irregular plural nouns in English, and it's helpful to memorize the plural forms of these words to avoid confusion.