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.
evidence
Noun
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Evidence is facts or observations that support an idea.
The gun is evidence that professor Pickle killed Mr. Mustard.
If there is clear evidence for lying, he/she should be punished.
The police are still seeking evidence to find out who the murderer is.
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In a courtroom, evidence refers to anything that is shown to the judge that is related to the case during a trial.