Set Eight You must first complete Set Seven before viewing this LessonPlease purchase the course before starting the lesson. Long vowels: a-e rule e-e rule i-e rule o-e rule u-e rule. Lesson tags: a-e rule, e-e rule, i-e rule, long vowels, o-e rule, u-e rule, Underlined a, Underlined e, Underlined i, Underlined o, Underlined u