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.
statement
Noun
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A statement is a claim someone makes that is true or false.
I don't agree with that statement.
of
Preposition
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Made using.
It is a house of cards.
basic
Adjective
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When something is basic, it is simple.
Everyone in the army has to have basic training.
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When something is basic, it is fundamental or important.
Water is a basic necessity of human life: you cannot live without it.
basic
Noun
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Basics are things that are essential.
Beginners must first learn the basics before they become experts.
accounting
Noun
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Accounting involves keeping records on financial information.
—
An accounting goes over an event that happened and the explanation for why it happened.
theory
Noun
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A theory is an idea that tries to explain an observation.
The new information showed that his theory about growth was incorrect.
Nobody has disproved Einstein's theory of general relativity.