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.
hall
Noun
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A hall is a large space with a roof and walls. It can be a kind of large building, or a room or part of a building. Most commonly, it is the area just inside the front door.
Please leave your boots in the front hall.