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.
snow
Noun
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Snow is precipitation (falling water) that is white and frozen.
I love the snow.
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A snow is a time when snow falls from the sky.
The snows of winter will soon come.
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A shade of the color white.
snow
Verb
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If it is snowing, snow is coming down from the sky.
It snowed last night and everything is white now.
job
Noun
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A job is an activity that you do, usually, regularly and for pay.
She got a good job as a manager in a book store.
She does the same job as George, and she does it faster and better.
Son, come here. I have a job for you before you start watching TV.
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A job is a task that a computer performs.
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A job is a plastic surgery that is done on someone. Usually used with another word to form a noun.
John just had a nose job.