Applications and rules for undefined articles.

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Applications and rules for undefined articles. by Mind Map: Applications and rules for undefined articles.

1. According to Oxford Dictionaries, it is a determinant that introduces a nominal phrase. They are considered indefinite articles and are used to introduce new concepts in a discourse.

2. This is divided in two

2.1. in article a

2.2. in article an

3. In general, the indefinite article a is used in front of a noun (name) that starts with a consonant.

3.1. I bought a car

3.2. Do you have a pen?

4. The indefinite article is still used in front of a noun that begins with a vowel.

4.1. She saw an elephant.

4.2. They have an idea.

5. However, there are some exceptions. Nouns that begin with eu- or ur- require the indefinite article a.

5.1. Eu- a euro a european country a eucaliptus tree a eulogy

5.2. Ur- A uranium mine A uretic infection A urinal A urologist

6. The largest part of nouns and adjectives that start with uni- also take the indefinite article a.

6.1. uni– a unicorn a uniform a unit of measure a university

7. Attention, there are some adjectives that start with uni- that follows the general rule.

7.1. an unidentified flying object (a UFO) an unimportant call an unintended result an unintelligent person

8. Although those nouns begin with a vowel, their sound is not pure. Beginning vowels carry the sound of -y. That is why they require the indefinite article a instead of an.