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.
river
Noun
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A channel of water.
We go swimming in the river.
The river bends there.
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A lot of something.
He won a river of votes.
runs
Noun
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If you have the runs, you have diarrhea
through
Preposition
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To go through is to go into one side of something and come out the other side.
The thief came in through the window.
She pushed the thread through the hole in the needle.
it
Pronoun
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used to refer to an object without identifying or describing it; the object might have been described earlier in the text.
The house was very big. It had many rooms.
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used to describe the weather
It is very hot today.
I'm staying in because it is raining
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used to describe a situation in general
I don't like it when people tell me to do something.
It is hard to find a job.
it
Abbreviation
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It can be a short way of writing:
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# Italy or Italian
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# Information Technology, the use of computers