A or An ?

The article a is used before consonant sounds; an is used before vowel sounds.

Words beginning with h, o and u sometimes begin with a vowel sound, sometimes a consonant sound.

Consonant Sound: a heroic couplet (h sound)

a once-happy lover (w sound)

a universal problem (y sound)

Vowel Sound: an honest man (no h sound)

an only child (o sound)

an unusual insect (u sound)


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