Articles.

a) The indefinite articles. A/an 


both of the indefinite articles have the same meaning, the diference is that, we use "a" in front of consonant, on the other hand we use "an" in front of vowel, also both of them are general. 


Examples with "a" .


-My father gave to my mother a flower. 

-Lucy is drinking a bottle of water. 

examples with "an" 


My cousin bought an umbrella yesterday.

She has an ugly animal which bought the last Friday. 

THE PLURAL OF "A" IS ZERO! 




b) The definite article. 


When we want to refer an specific thing or something that is known, we must use "the".
Also, we sue "the" when thing are unique, its doesn`t matter if it is plural or singular. 


Examples. 


The children whose are in my school are smart.

The boyfriend of my sister is handsome and attractive.

The Suchitlan lake is one of the most beautiful places in Suchitoto. 

The National University of El Salvador has students whose are poor, but intelligent.