Plural: This is the most common use of "s". It is added to nouns to indicate more than one of something.
* Example: "cat" becomes "cats"
Possessive: "s" can also indicate possession, meaning "belonging to".
* Example: "The cat's tail" means the tail belongs to the cat.
Third person singular present tense: In verbs, "s" is added to the present tense form to indicate the subject is a singular third person (he, she, it).
* Example: "He walks"
Contraction: "s" is often used in contractions, combining words into a shorter form.
* Example: "it is" becomes "it's"
Other uses: The suffix "s" can also be found in words where it doesn't change the meaning significantly, simply being part of the word's spelling.
* Example: "books", "house"
To determine the specific meaning of "s" in a word, you need to consider the context of the word.