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.
stroke
Noun
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A stroke is when blood stops coming into your brain.
I had a stroke after running so hard.
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A stroke is an action of hitting something lightly.
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A stroke is the person who sets the speed in a rowing crew.
After years of training he was made stroke in the Oxford University crew.
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A stroke is something that happens without warning.
She had a stroke of good luck playing cards and won 20 dollars.
stroke
Verb
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If you stroke something, you touch something with the hand, and move your hand gently up it.
She stroked his hair lovingly.
of
Preposition
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Made using.
It is a house of cards.
luck
Noun
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Someone who has good luck is someone who regularly has good things happen to them, almost as if by magic.
Many people believe the number 13 will bring you bad luck.
luck
Verb
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To succeed by chance.
He lucked into a great job.