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.
wrinkle
Noun
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A wrinkle is a line or crease on old and fragile skin, usually caused by old age or tiredness.
My grandfather had a lot of wrinkles on his face.
wrinkle
Verb
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To wrinkle is to make lines, creases, or folds on a smooth surface.
When he smiled, his face wrinkled.
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.
time
Noun
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Time is what we measure with a clock.
"What time do you finish work?" "At four o'clock (4:00)."
I don't have time to talk to you right now. Can we do it later?
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If you do something one time, you do it once.
time
Verb
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If you time something, you measure how long it takes in seconds, minutes, hours, etc.
Take out your watch and time yourself during the test.