Beginner level education English song teaching when to use the articles "a" and "an." Learn English and rock! Lyrics: A and an, a and an when to use a and an. A ball, a cat, a dog, a hat. A and an, a and an when to use a and an. A lion, a zebra, a box, a teacher. With a, e, i, o, u - use an. An apple, an orange, an umbrella, an egg, an octopus, an igloo, an elephant, an island. with a, e, i, o, u - use an!