Englishfor English speakers
a
Determinative
—
A is used when the following word could be any of a certain type.
Compare "A book I saw on the shelf" and "The book I gave you yesterday".
a
Noun
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A is the first letter of the alphabet.
The letter "a" comes before "b".
—
In some schools, an A is a very high grade.
Ron got an A on his earth science test.
map
Noun
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A map is an image of a place, usually with place names written in.
I think we're lost. Do you have a map?
I've got a good street map of London.
map
Verb
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If you map something, you create a visual representation of it.
John mapped out his idea so that his friends could understand it.
of
Preposition
—
Made using.
It is a house of cards.
the
Determiner
—
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?
—
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.
world
Noun
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The Earth.
Our world needs to be cared for.
—
The .
I love you more than anybody else in the world.
—
The setting of a group of people.
They were in their own world as they talked about trains nobody else knew about.
—
A planet.
I wonder if there is life on other worlds.