Articles a/an

1. ejemplos

1.1. an

1.1.1. An apple

1.1.2. An elephant

1.1.3. An umbrella

1.1.4. She is an engineer.

1.1.5. an operation

1.1.6. an illusion

1.2. a

1.2.1. A lot of people

1.2.2. A dozen of apples

1.2.3. He is a lawyer

1.2.4. A woman.

1.2.5. A book

1.2.6. A dog

1.2.7. A house

2. Do you know what an article in English grammar is?

2.1. An article is a word that is used to modify a noun, which is a person, place, object or idea Technically, an article is an adjective, which is any word that modifies a noun. Normally, adjectives modify the names through the description, but in their Instead, the elements are used to indicate or refer to names

3. 3. We use ONE (or more) instead of A/AN when the number is important.

3.1. There is only one exit from the airport.

4. 1. Singular nouns and the first time we refer to a person, animal or thing

4.1. a child

4.2. an elephant

4.3. a television

5. 2. We don't use A/AN with possessive pronouns, demonstratives or cardinal numbers.

5.1. My shirt is dirty.

5.2. This car is expensive.

5.3. One person is in the reception.