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.
clean
Adjective
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If something is clean, it is free from dirt
The kids came back from the washroom with clean hands and faces.
Did you wash these dishes? They don't look very clean.
To keep the air clean, smoking is not allowed.
I clear our breakfast and wipe the table clean with a wet rag.
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If a technology is clean, it doesn't produce much pollution.
We want to use wind as safe, clean, non-polluting energy.
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If something is clean, it is not bad.
There was a lot of pushing in their last game, but today's match was mostly clean.
No dirty jokes, please. Keep your language clean.
The police searched the car for drugs, but it was clean.
Her driving record was clean.
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A clean piece of paper, start, etc. has nothing from before: no writing, no history, etc.
Why don't you get a clean piece of paper and start over.
I wanted a clean start, so I moved to LA.
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If a something is clean, it is smooth, simple, and regular, without anything unwanted.
Your company website needs a clean design that makes it easy for consumers to understand what you're selling.
It's a clean cut, made with something sharp like a razor or a knife.
clean
Verb
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If you clean something, you take away the dirt and put everything in its place.
Tomo, will you clean up your room please. There are clothes all over the floor.
Bill
Proper noun
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Bill is a male given name. It is short for William.
Bill is working on a report.
bill
Noun
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A bill is a piece of paper money; a banknote.
I paid for my sandwich using a twenty-dollar bill.
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A bill is a piece of paper telling you what other people have done for you and how much you owe them.
"Ask the waitress if we can have the "bill" now."
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A bird's bill is its beak (the hard mouth part).
The toucan is known for its colorful bill.
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A bill is a proposed law.
The bill passed the Senate.
bill
Verb
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If you bill someone, you give or send them a bill.
The shop billed me $100 for tickets.
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If you bill a person or an event, you announce them.
He was billed as "The Great Houdini".
of
Preposition
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Made using.
It is a house of cards.
health
Noun
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If you talk about the health of a person or animal, you are talking about whether they are sick or not.
The doctors believe that the disease will not be a serious danger to public health.
Before you start exercising, you should be in good health.
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If you have health you are not sick (do not have disease) and are not hurt.