Englishfor English speakers
a
Determinative
—
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".
—
In some schools, an A is a very high grade.
Ron got an A on his earth science test.
sly
—
adjective
(= cunning, foxy, slick, tricky, wily)
marked by skill in deception
cunning men often pass for wise
deep political machinations
a foxy scheme
a slick evasive answer
sly as a fox
tricky Dick
a wily old attorney
cow
Noun
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A common farm animal, the female cattle
Milk comes from cows.
—
The female of several other kinds of animal, such an elephant cow or a whale cow.