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.
lady
Noun
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A polite way of saying "woman".
Please direct this lady to the soft furnishings department.
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The wife of a lord or a woman who holds the office in her own right.
Lady Diana was very popular with the British people.
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A polite woman who is respected.
Mary, please try to act more like a lady in public.
If you are not ladylike, you will not be seen as a lady.
killer
Noun
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Someone who kills. Usually this mean someone who kills other people, and does not have a good reason to kill.
The police caught the killer today.
She was happy that her brother's killer was caught.
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Something that kills.
Lighting can be a real killer.
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Something that cause problems.
Failing the exam was a real killer.
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Something that is very exciting.
The show was great, a real killer.
killer
Adjective
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If something is killer it kills.
Watch out! There are killer bees!
The family barely got away from the killer storm.
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If something is killer it is very good.
That was a killer show!