Definite and indefinite articles

It’s Been Introduced

The first time you introduce something, you use “a” or “an.” For example, “A man walks into the bar” would be the first time he was introduced. After that, you would switch to “the”

• 
  The man rubs his head and says, “Ouch! Where'd that bar come from?”
  
• 
  The man orders a drink.
  
• 
  After finishing the drink, the man watched the couple behind him talking.
  

Unique People or Object

If there is only one in existence or it is unique, then you would use the definite article “the.” For example, there is only one “Sistine Chapel” and only one “Eiffel Tower.” This would look like:

• 
  We visited the Sistine Chapel when we were in Rome.
  
• 
  My family saw the Eiffel Tower.
  
• 
  The sun was beautiful.
  
• 
  The sky looked amazing.
  

This also includes unique objects in a specific place. Like “the bathroom” in your house.

• 
  Where is the bathroom?
  
• 
  The bathroom is next to the kitchen.
  
• 
  I found the book in the hallway.