Englishfor English speakers
decade
Noun
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A decade is a period of 10 years.
The 1960s was a decade of great change in North America.
of
Preposition
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Made using.
It is a house of cards.
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."
—
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.
brain
Noun
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Your brain is the part of your body that is inside your head.
The brain is the part of the body that thinks and controls the rest of the body through the nervous system.
He has serious brain damage from falling off of his bicycle and hitting his head.