El perro está en el jardín.
English: The dog is in the garden.
In Spanish, definite and indefinite articles are short words placed before nouns to show if we are talking about something specific or something in general.
Use definite articles when you talk about a specific thing or person. Use indefinite articles when you talk about something not specific or when you mention something for the first time.
El perro está en el jardín.
English: The dog is in the garden.
Una manzana es roja.
English: An apple is red.
Las chicas cantan.
English: The girls sing.
Unos libros están en la mesa.
English: Some books are on the table.