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.
och
interjection
—
(chiefly, Scotland, Ireland) general interjection of confirmation, affirmation, and often disapproval.
—
(chiefly, Scotland, Ireland) an expression of anger, frustration, surprise
o
Noun
—
The fifteenth (15th) letter of the alphabet. It is a vowel.
"o" comes after "n" and before "p"