"The" and "A/An"
There are two types of articles:
1. Definite Article: "The"
Use "the" when referring to a specific noun that both the speaker and listener know.
It can be used with singular and plural nouns.
Example:
The sun is bright today. (There is only one sun, so it is specific.)
I saw the cat in the garden. (The listener knows which cat is being referred to.)
2. Indefinite Articles: "A" and "An"
Use "a" or "an" when referring to a general noun, not a specific one.
They are used only with singular nouns.
"A" is used before words that start with a consonant sound.
Example: a dog, a book, etc..
"An" is used before words that start with a vowel sound.
Example: an apple, an elephant, etc..
Peculiarities to bear in mind