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.
hard
Adjective
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If something is hard, it is not soft.
I kicked the wall and hurt my foot. The wall is hard.
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If something is hard, it takes a lot of work to do or understand.
Only two people passed the test because it was so hard.
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If something is hard, it is sudden and sharp.
He took a hard hit to his arm.
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If a drink is hard, it is strong.
Hard liquor
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If something is hard, it cannot be questioned; it is not questionable.
Hard evidence
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If someone is hard, they are severe; they are unfriendly.
hard
Adverb
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If something is done hard, it is done with a lot of effort.
He works hard, all day and all night.
hard
Noun
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A hard is a beach or slope that is firm that is a good place to take a boat out of the water.
day
Noun
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A day is a measure of time.
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24 hours
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Seven days make one week
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The time between midnight and the following midnight (or between sunset and sunset in Jewish reckoning)
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The time between sunrise and sunset, when it is daylight
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The part of a day spent at work or school
He spent two days at work means that on two days he went to work; he did not spend 48 hours at work.