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.
thrusting
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noun
(= jab, jabbing, thrust)
a sharp hand gesture (resembling a blow)
he warned me with a jab with his finger
he made a thrusting motion with his fist
politician
Noun
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A politician is a person who is involved in politics, especially those in elected offices.
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A politician is a person who considers an elected position a career.
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A politician is a person who is active in politics.