Englishfor English speakers
beside
Preposition
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If mathx/math is beside mathy/math, it is close to mathy/math, but not in front or behind.
The book is beside the table.
the
Determiner
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Used, instead of a, to reference something specific, already known to exist.
Compare "I read a book." and "I read the book."
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Used with a stress, to show that the word following is special.
Are you the John Smith that I went to school with?
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Used with an adjective that acts like a noun to mean all of the people concerned
The poor are always with us.
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Used with superlatives forms of adjectives and adverbs.
You are the best.
purpose
Noun
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A purpose is reason for doing something or for existing.
Coal is used for only three purposes: heating houses, generating electricity and making steel.
The main purpose of the visit was to see the new building.
purpose
Verb
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If you purpose to do something, you plan on doing it.