Indefinite Articles - Usage and Collocations

1.The articles 'A' and 'An' are indefinite articles. They are used before a singular countable common nouns.
        Example:

A feather is lighter than an elephant.

The article 'a' is used to express quantity.

A little sugar, A large quantity, A huge amount.

2.We use “A” before nouns or adjectives which begin with a consonant or when U sounds like a Y, or O sounds like a W.

A Chair
A book
A university
              A one-eyed man

3.We use an before words which begin with a vowel sound or a silent “H” sound.

An egg
An umbrella
An hour-glass
An antique necklace

Summary

1.The articles 'A' and 'An' are indefinite articles. They are used before a singular countable common nouns.
        Example:

A feather is lighter than an elephant.

The article 'a' is used to express quantity.

A little sugar, A large quantity, A huge amount.

2.We use “A” before nouns or adjectives which begin with a consonant or when U sounds like a Y, or O sounds like a W.

A Chair
A book
A university
              A one-eyed man

3.We use an before words which begin with a vowel sound or a silent “H” sound.

An egg
An umbrella
An hour-glass
An antique necklace

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