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An
is used: -
a) Before a vowel; as,
an
enemy, an inkpot, an umbrella, an owl,
an orange.
b) Before a word beginning with a Silent
h;
an
heir, an honorable man, an honest person.
c) Before a consonant which sounds like
a vowel;as,
An M.A. of the Punjab
University.
An M.B., B.S.,
etc.
Caution:
- Remember A and An
are used before singular nouns only. as a rule, a common noun in the singular
number requires a, an, the; for
instance, a student loves a quiet hour; students love quiet
hours. Proper and Material nouns seldom take a or an;
for example, Gold is a precious metal; cotton is our cash crop; Napoleon
was a great general; but it is also correct to say, ‘Only a
Napoleon could have saved the situation, but the country had no such man of
genius.’