There are twenty six letters in the English alphabet, five of them are vowels and twenty one of them are consonants. A, E, I, O, U are the five main vowels.Vowels are a syllabic speech which pronounced without any control over a vocal tract. We can breathe freely while pronouncing any vowels. The world vowel came from a Latin word “vocalis” , in English which means vocal. In English a, e, i, o, u, represent both vowels sounds and written symbols. But in Latin writhing system sometimes A, E, I, O, U, Y, W can be called as vowels. Not every letters of an alphabet represent vowels. Specifically Y and W are also used to state approximant consonants. In English pronountation the five letters A E I O and U can represent a spread of vowel sounds, while the letter Y frequently represents vowels, like gym, happy, thyme and many more, on the other hand W is use to represent gliding vowels, and some pure vowel at the same time. Vowels have a huge importance in language . The work of vowels id to distinguishing one word from another varies from language to language. All languages have a minimum of three phonemic vowels, usually I, A U. The number of vowels are depends on how they are counted. One of the most common vowel is A. In English vowels are most important thing to study we can not learn English without vowels.