Englishfor English speakers
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.
thinker
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noun
(= mind)
an important intellectual
the great minds of the 17th century
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noun
someone who exercises the mind (usually in an effort to reach a decision)