Use of Articles a / an
by Erika Perez
1. According to the Oxford Dictionaries it is a determiner that introduces a noun phrase. a|an are considered indefinite articles and they are used to introduce new concepts into a discourse.
2. Rule
2.1. A
2.1.1. Use “a”, “and” only with singular nouns or if you start with a consonant
2.2. Some examples are
2.2.1. a cat
2.2.2. a heart
2.2.3. a book
2.2.4. a pencil
3. Rule
3.1. AN
3.1.1. Use “an” with words that start with a vowel sound or h mute
3.2. Some examples are
3.2.1. an animal
3.2.2. an apple
3.2.3. an hour
3.2.4. an alligator