Because not all vowel sounds can be represented by 5 letters, there are rules.

"A" can represent 2 sounds. "Aa" represents the vowel sound made in the word "cat." "A," by itself, represents the sound in the word "car."

"E" represents 2 sounds as well. "E" alone represents the same sound that "e" makes in Spanish. "EE" represents the sound made in the word "vet."

"I" can represent 3 sounds. "I" alone represents the sound made in the word "die." "II" represents the sound made in the word "live." The sound made in the word "beat" is represented by "i" with an accent, or "í."

"O" represents the "nope" sound.