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.
girl
Noun
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A girl is a female child or teenager; someone who is not a woman yet.
Many girls like to play with dolls.
I have two children: a boy and a girl.
—
A female person of any age (even a woman).
The girls are going out tonight, do you want to come?
I really love that girl.
—
A female animal.
My cat is a girl.
She is a girl cat.
asleep
Adjective
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If you are asleep, you are sleeping.
Please be quiet. The baby's asleep.
I had trouble falling asleep last night.