* If "es" is a word on its own: It's already plural, and the plural form is still "es". For example, "es" can be used to refer to Spanish words ending in the letter "s".
* If "es" is part of a word ending in "es": The plural form depends on the specific word. Here are some examples:
* Nouns: "boxes", "glasses", "churches", "buses"
* Verbs: "flies", "tries", "cries", "dies"
* Adjectives: "nervous", "serious", "dangerous"
* If "es" is part of a word that does not end in "es": The plural form will follow the usual rules for forming plurals in English.
Let me know if you have a specific word in mind, and I can help you find the plural form!