The is used to refer to specific or particular nouns; a/an is used to modify non-specific or non-particular nouns. We call the the definite article and a/an the indefinite article. For example, if I say, "Let's read the book," I mean a specific book.
Why does English have the word the?
The word the is very important to native speakers of English because it is used to divide the world we process through language into two categories: old information and new information. It helps us to divide the world into things which we agree are known, or important, and things which we feel aren't.
Why is the the most used word?
'The' appears most frequently in academic prose, offering a useful word when imparting information – whether it's scientific papers, legal contracts or the news. Novels use 'the' least, partly because they have conversation embedded in them.
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