Adding S Or Es. But sometimes, some words ends with "s" and are singular in those cases you would need to add. The rules of adding s/es to nouns and verbs are mostly the same.
If you are referring to a general rule, or are speaking about ALL of the items in one category (all trees, all computers, all. Example:To run - runsTo sit - sitsVerbs that end with a vocal add es. Which words do we add -es to and why? bus - buses, business - businesses, match - matches, box - boxes.
Example:To run - runsTo sit - sitsVerbs that end with a vocal add es.
And you don't have to memorize a list of rules!
Most regular count nouns take the -s ending to form the plural. Basically, if the noun ends in a "consonant + y," the -y is changed to -i- and -es is. Normally, we add -s for the verbs in Simple Present Tense: He never eats breakfast.