A, an

A and an have the same meaning and as they both mean one, they are used only before a singular countable noun (a hat). We do not place either of them before a plural noun or an uncountable noun.

Examples:

  • He who kills animals illegally is a poacher.
  • His father works as an accountant in a multi-national company.

 
The

We use the before the following types of nouns:

Examples:

Singular countable noun

  • The serial killer has struck again.

Plural countable noun

  • Rebel forces killed two of the soldiers.

Uncountable noun

  • The sand blown by strong wind covered the entire area.

Proper noun

  • The Brown family you have been waiting for has arrived.

 

Zero Article
When we use the zero article before the following types of nouns:
 

Examples:

Plural countable noun

  • Dogs bark all the time. 
  • Most of them who spend time at this coastal resort are tourists.

Uncountable noun (always singular)

  • Rice is currently in short supply in the province.
  • Drug overdose caused his death.

Proper noun

  • Rome is a great city.
  • Her first language is English.