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.
coke
Noun
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If you burn coal, you will have coke left over, and you can use the coke for fuel.
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Coke is a nickname for a brand of soda called Coca-Cola.
I don't like sugary drinks, but my sister drinks eight cans of Coke every day.
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Coke is slang for cocaine.
When they searched the car, the police officers found two kilograms of cocaine. The car's owner yelled "That's not my coke!"
please
Interjection
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We say "please" when we want to ask someone politely to do something.
Pass the salt, please.
please
Verb
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Someone pleases someone else when they do what that person likes or wants.
Giving her these flowers will please her.