Here's the rule breakdown:
* If the letter before the "y" is a consonant, you change the "y" to "i" and add "es".
* If the letter before the "y" is a vowel, you simply add "s".
Let's look at some examples:
Words that change "y" to "i" and add "es":
* baby -> babies
* body -> bodies
* city -> cities
* fly -> flies
* story -> stories
* try -> tries
Words that simply add "s":
* boy -> boys
* toy -> toys
* monkey -> monkeys
* valley -> valleys
* attorney -> attorneys
It's important to note that there are a few exceptions to this rule, and some words can be pluralized in both ways.
Let me know if you have any other questions or would like to see more examples. 😊