How to using ARTICLES

English has two articles only

1. A/ An - Is an indefinite article
2. The - Is definite article

A - Indefinite Articles

  A is used when the next word begins with Consonant sound and Common noun(b,c,d,f,g,h etc..)

  

Examples:- 

• a pen
• a book 
• a chair
• a one-dollar note
• a one-man army

An - Indefinite Articles

An is used when the next word begins with a vowel sound (a, e , i, o, u) .

Examples:-

• an apple    
• an hour
• an Umbrella
• an MA
• an BA
• an LLB
• an BSC

The- Definite Articles

We use The with 

• Something that is unique or there is only one.       

              Examples:-  the Sun , the moon, the sky , the earth

• Second time you talk about the same Noun

             Examples:- I bought a shirt. The shirt is red

• Directions

            Examples:-  the south , the north, the west , the east

• Names of Ocean, Gulfs, Seas and Rivers

  Examples:- the Pacific, the Atlantic, the Persian Gulf, the Nile, the Ganga

• Names of countries with united states or islands 

  Examples:- the United States, the UK, the Philippines etc

• Names of great lakes  

  Examples:- the Great lakes, the African great Lakes

• Names of mountain ranges  

  Examples:- the Himalayas, the Andes etc

•  Names of group of Islands

   Examples:- the Himalayas, the Andes etc