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.
casualty
Noun
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A casualty is a person who has been hurt, even killed, in an accident, or an act of violence.
The only casualty in the bus crash was an old man who broke his arm.
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The casualty department of a hospital is where people who have been hurt are first taken for medical treatment.
Casualty was crowded with injured people after the accident.