GIVE ANSWERS - English

"a" and "an" are indefinite articles in English: they means "one" or some people define the meaning like "any"

the difference is in using: if first letter of noun comes as a consonant it's using "a" if there is a vowel then "an" comes instead of "a"

For example:

first it comes as a consonant: a pan, a cat, a dog, a language. etc.
...as a vowel: an apple, an orange, an eye, an ocean etc.

"The" is a definite article and generally you use it when talking about something that has been mentioned before (I am baking a cake. The cake is for my birthday party.) or when you're talking about a particular person or thing (I saw the car you mentioned yesterday).

You also use 'the' with names of rivers, groups of islands, mountain ranges, countries in plural... (The Atlantic, the Nile, the Rocky Mountains, the Netherlands)

There are a lot more examples. Also while you can use 'a' or 'an' only in the singular, you can use 'the' in both the singular and plural nouns. (the table, the rooms)

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