What are "A" and "An"?

In English, when we talk about one general thing (a singular noun), we usually put a small word in front of it. These words are called indefinite articles. They simply mean "one."

We use "A" or "An" when we are talking about a thing for the first time, or when it doesn't matter exactly which one we mean.

The Rule for "A"

We use A when the next word starts with a consonant sound. Consonants are letters like B, C, D, F, G, H, P, S, T, etc.

• A car (Starts with the 'C' sound)
• A dog (Starts with the 'D' sound)
• A book (Starts with the 'B' sound)
• A teacher (Starts with the 'T' sound)

The Rule for "An"

We use An when the next word starts with a vowel sound. Vowels are the letters A, E, I, O, U.

Why do we do this? Because saying two vowel sounds together is hard to pronounce. "An" makes the words flow smoothly!

• An apple (Starts with the 'A' sound)
• An elephant (Starts with the 'E' sound)
• An ice cream (Starts with the 'I' sound)
• An umbrella (Starts with the 'U' sound)

Watch Out for the "Sound" Trap!

Remember, the rule is about the sound of the word, not just the spelling!

• An hour: Even though "hour" starts with an H (a consonant), the H is silent. It sounds like "our," which starts with an 'O' sound. So we say an hour.
• A university: Even though "university" starts with a U (a vowel), it sounds like it starts with a 'Y' ("you-ni-ver-si-ty"). So we say a university.