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.
crash
Noun
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A crash is something that happens between things. Something that comes together.
I saw a horrible crash on my way home. Two cars had hit each other.
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A crash is a loud sound like a clang that happens when two things hit each other.
I heard the crash of the cymbals clearly.
crash
Adjective
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If something is crash, it is very quick; it is very fast.
crash
Verb
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If something crashes, it hits something else. This could be the ground.
We crashed into each other because we were not looking.
The plane crashed (hit the ground), killing everyone on it.
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If you crash something, you cause it to hit something.
I crashed my car. Now I have to walk.
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If you crash somewhere, you sleep there.
I'm too tired to get home, could I just crash here?
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If you crash, you were on drugs and are now tired or sick because the drugs are gone.
He felt so good when he was high, but when he crashed he wanted to die.
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.