Englishfor English speakers
a
Determinative
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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".
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In some schools, an A is a very high grade.
Ron got an A on his earth science test.
couch
Noun
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A soft, plush seat for one or more people, often made of leather or cloth.
in
Preposition
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Used to show that something is inside something else.
The cat is in the box.
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Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
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Used to show movement towards the inside.
The rain came in through the window.
new
Adjective
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If something is new, it is not old.
They had a new car.
In 1900, the idea was very new.
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If somebody is new, they are not experienced.
They hired a new worker.
York
Proper noun
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York is a city in England.