Hard and fast rules are hard to come by but here are some guidelines on words that end in 'es' where an 'e' does not end the singular.
1. Word ends in an 's' or 'ss'
'es is not used to make the word fox into a singular possessive noun, rather you should add 's to fox to do so. If you add the suffix -es to fox, it would then make the word plural, and if you add a ' to the end of foxes, it would make the word possessive. fox = singular noun fox's = singular possessive noun foxes = plural noun foxes' = plural possessive noun
If it ends in an S add ES: Compasses.
For words ending in consonants, either add s or es. In this case- es. The plural is kisses.
The plural from for the singular noun hike is hikes, just add -s. The possessive form for the singular noun hike is hike's, just add -'s.
For words that end in O, add either s or es.
If a word ends in 'y' preceded by a consonant, change the 'y' into an 'i' then add 'es'. Example: Cry. Plural: Cries. If a word ends in an 's', 'sh', or 'ch' sound, you add 'es' to form the plural in order to be able to pronounce it. For example: Fox, foxes; branch, branches.
To make the word "wash" plural, you simply add an "es" to the end, making it "washes."
To form the plural of a noun ending in an 's', 'z', 'sh', 'ch', or any other sibilant ('s') sound, you add '-es'. The pronunciation of the letter 'x' ends in an 's' sound, therefore you add '-es' to the word. For example: Box, boxes.
It is "I","ss","x", and "y".
The plural form for the noun piano is pianos, just add -s.
To change quiz to plural, double the z and add es. The plural is quizzes.
A noun can end with various suffixes such as -s, -es, -ness, -tion, -ment, -er, -ist, etc. The ending of a noun can provide information about its grammatical function or meaning in a sentence.