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.
brilliant
Adjective
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If something is brilliant, it gives off a lot of light.
It was evening with the brilliant colors of sunset shining through the trees.
The sun's light was so brilliant that I needed to close my eyes.
The sky was a brilliant blue that day, and the air was cold.
He noticed a brilliant star in the sky.
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If something is brilliant, it is very good.
Truly brilliant ideas can sound crazy at first.
She wrote a book about her brilliant career in television.
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If a person is brilliant, they are very intelligent.
He was a brilliant teacher.
idea
Noun
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An idea is a concept or a thought.
It was a good idea.
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An idea is something abstract (not concrete).
Love is just an idea.
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An idea is a way to see something, a view.
He changed her ideas on religion.