(a) bunch of

Pick a or an by the sound that follows, not the first letter you see. Below are compact rules, clear examples you can copy, quick rewrites, and short checks you can use immediately.

If you need a single quick test, say the next word out loud: vowel sound → an; consonant sound → a.

Quick answer

Say the next word aloud. If it begins with a vowel sound use 'an'. If it begins with a consonant sound use 'a'.

• an hour (silent h → vowel sound /aʊ/)
• a university (u pronounced /j/ like 'you' → consonant sound)
• an MBA (M pronounced /ɛm/ → vowel sound)

Core rule (very short)

Decide by the first sound you hear, not the first letter you see. Read the article + word aloud and match the article to that sound.

If unsure, pronounce the word or abbreviation the way you would in conversation and choose a/an accordingly.

• Vowel sound → an (an apple, an M.P., an honest mistake)
• Consonant sound → a (a cat, a university, a Eurozone contract)

• Wrong: I saw an European film.
  Right: I saw a European film.
• Wrong: She hired a MBA graduate.
  Right: She hired an MBA graduate.
• Wrong: He bought a orange sweater.
  Right: He bought an orange sweater.

Silent h and similar cases

Treat words with silent h as if they start with a vowel sound: an hour, an heir, an honest opinion. If the h is pronounced use a: a hotel, a historic moment.

• an hour, an heir, an honest mistake (silent h → vowel sound)
• a hotel, a historic win (pronounced h → consonant sound)

• Wrong: She is a honest person.
  Right: She is an honest person.
• Wrong: We waited for an hotel shuttle.
  Right: We waited for a hotel shuttle.

Acronyms, letters, initialisms and numbers

Pronounce the abbreviation. If the spoken first sound is a vowel, use an. That applies to letters (F → /ɛf/) and initialisms (FBI → /ɛf.biː.aɪ/).

For numerals, use the article that matches how you say the number (11 → 'eleven' begins with /ɛ/, 1 → 'one' begins with /w/).

• an FBI agent (F → /ɛf/ → vowel sound)
• a NATO summit (N pronounced /n/ as a word → consonant sound)
• an 11-year-old (eleven → vowel sound); a 1-minute wait (one → /w/ consonant-like)

• Wrong: A FBI investigator will attend.
  Right: An FBI investigator will attend.
• Wrong: She bought an 1% stake.
  Right: She bought a 1% stake.

Hyphenation and spacing: article follows the first pronounced element

Read the whole phrase aloud and use the article that matches the first pronounced sound, not the first printed character. Hyphens don't change pronunciation but can guide clarity.

• an hour-long meeting (hour → /aʊ/ → an)
• a one-time opportunity (one → /w/ → a)
• an S-shaped curve (S → /ɛs/ → an)

• Wrong: I scheduled a hour-long meeting.
  Right: I scheduled an hour-long meeting.
• Wrong: This is an one-off solution.
  Right: This is a one-off solution.

Try your own sentence

Test the whole sentence, not just the phrase. Context often clarifies rhythm and article choice.

Real usage: copyable examples for work, school, and casual

Pairs below show common mistakes plus corrections; usage lines are ready to paste into emails, essays, or messages.

• Work - Wrong: Please send a NDA before the meeting.
  Right: Please send an NDA before the meeting.
• Work - Usage: We scheduled an hour to review the Q2 numbers.
• School - Wrong: He is a honor student.
  Right: He is an honor student.
• School - Usage: I got an F on my chemistry test.
• Casual - Wrong: She bought a orange bike.
  Right: She bought an orange bike.
• Casual - Usage: I'm an Uber driver three nights a week.

Fix your sentence: short checklist + rewrite examples

Checklist: 1) Say the next word aloud. 2) If it starts with a vowel sound → use an; consonant sound → use a. 3) For abbreviations, say the letters aloud. 4) Re-read the sentence for rhythm.

Copy these rewrites into drafts as needed.

• Rewrite:
  Original: They applied a MBA program. Revised: They applied to an MBA program.
• Rewrite:
  Original: She waited for a hour to begin. Revised: She waited for an hour to begin.
• Rewrite:
  Original: I met a heir of the founder. Revised: I met an heir of the founder.

Memory tricks and quick practice

Two quick tricks: 1) The one-second test - say the next word alone; 2) If it starts with a y-like sound (/j/ as in 'you') use a (a university, a European).

Practice: scan five recent emails, circle each a/an, say the next word aloud, and correct any mistakes.

• Flashcards: honest (an), hour (an), university (a), MBA (an)
• Daily micro-check: fix three sentences per day from your drafts aloud
• Usage: Flashcard: 'honest' → Say 'honest' aloud → an honest opinion.

Similar mistakes to watch for

After you fix a/an by sound, check whether the noun needs the definite article 'the' (specific vs general) and whether the noun is countable. These are separate choices but often come up together.

Don't use articles with uncountable nouns unless a determiner is required (not 'an informations'). Also avoid combining articles with possessives (a my friend → incorrect).

• a vs the - specificity, not sound (a dog vs the dog)
• No article with uncountable nouns unless necessary (information, advice)
• Don't confuse articles with possessives (My friend, not a my friend)

• Wrong: She needs an informations about the course.
  Right: She needs information about the course.
• Wrong: A my friend will join us.
  Right: My friend will join us.

FAQ

Why is it 'an hour' but 'a hotel'?

'Hour' has a silent h and begins with a vowel sound (/aʊ/), so use an. 'Hotel' has a pronounced h (/h/), so use a. Always choose by sound, not the letter h.

Is it 'a university' or 'an university'?

Use 'a university'. 'University' starts with a y-like consonant sound /j/ (like 'you'), so the correct article is a.

Should I use 'an' before letters and grades?

Yes - letters and grades are pronounced as letters. Use an before letters that start with vowel sounds: an F, an S (/ɛf/, /ɛs/).

What about 'historic' - a or an?

Both forms exist. Historically some used 'an historic' when h was treated as silent; modern usage usually uses 'a historic' because speakers pronounce the h. Follow pronunciation and your audience.

Quick proofreading tip - how do I check multiple instances fast?

Search your draft for " a " and " an " (with spaces), then apply the one-second test: say the next word aloud. Fix each instance and re-read the sentence to confirm flow.

Want to check a sentence now?

Paste a sentence that feels off and try the one-second test. Repeating this with real lines from your writing is the fastest way to make the right choice automatic.