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an ad vs a ad

The correct phrase is "an ad." The choice between using "an" or "a" depends on the sound that follows. Since "ad" starts with a vowel sound, we use "an" before it.

Last updated: March 28, 2024

an ad

This phrase is correct. When a word starts with a vowel sound, we use "an" before it.

Use "an ad" when referring to an advertisement. The use of "an" is to ensure smooth pronunciation when the following word starts with a vowel sound.

Examples:

  • I saw an ad for a new phone.
  • She placed an ad in the newspaper.

Alternatives:

  • an advertisement
  • a commercial
  • a promotion
  • a marketing campaign
  • a sponsored post

a ad

This phrase is incorrect. The article "a" should not be used before a word starting with a vowel sound like "ad."

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