Articles in English. A, an, the; A, An, The. They precede the nouns and are used in undefined expressions. A / an is used only with countable singular nouns. Those who start with the consonant letter have “a” tag at the beginning of the word, and nouns that begin with a vowel that will have ”an” tag at the beginning of the word. A / an is usually used when expressing what an object is. We cannot use countable singular nouns alone. Example Sentences with Articles I saw an accident of a car. That is an excellent pencil. Alex is training