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.
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.
era
Noun
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A time period, generally more than one year. Often used to show a time when something important was happening.
The Elizabethan era is when Queen Elizabeth was the Queen of England.
During the World War II era, jazz music was popular.