Spelling Rules. Adding –s, - es , - ing and - ed. Vowels: a, e, i , o, u Consonants: all other letters. Vowels and Consonants. 1. For most third-person singular (he, she, it) verbs and for plural nouns, add –s to the simple form : Verb: swim swims Noun: lake lakes.
Adding –s, -es, -ing and -ed
traveltravelling or traveling