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.
course
Noun
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In school, a course is a class in a specific subject.
The science course was very difficult.
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A course is the path that something follows in space or in time.
During the course of the evening, things went from bad to worse.
The economy grew quickly over the course of the next few years.
In the course of testing the drug, they found new uses for it.
One teacher can completely change the course of your life.
We'll have to let the disease take its course.
It is important that we decide now on the future course for the company.
The wind kept blowing the boat off course.
The course of the river has changed over time.
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For a meal, a course is one part of a meal such as dessert.
We usually do not eat a meal with nine courses.
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Some games are played on a course.
The game of golf is played on a golf course.
course
Verb
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If something courses, it runs or flows through something.
Blood courses through the veins and arteries in our bodies.
The oil coursed through the engine.
in
Preposition
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Used to show that something is inside something else.
The cat is in the box.
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Used to show that someone is at home, or is available.
Is John in?
The Doctor is now in.
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Used to show movement towards the inside.
The rain came in through the window.
miracle
Noun
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A miracle is an amazing thing that happened that seemed very unlikely to happen.
Thanks to a miracle, Jane recovered from the final stage of cancer.