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Unit 04
Articles: A / An
Using indefinite articles correctly
What are A and An?
In English, a and an are called indefinite articles. We use them to talk about something general or not specific — usually for singular, countable nouns.
Examples: I bought a book yesterday. / She is an engineer. / Let's go to a café.
First mention rule: We use a/an the first time we mention something. When we talk about it again, we use the: I saw a cat. The cat was white.
The Golden Rule: Sound, Not Spelling!
Tricky cases — focus on the sound:
- an hour — "hour" starts with a vowel sound (the H is silent)
- a university — "university" starts with /juː/ ("you" sound), which is a consonant sound
- an honest person — silent H, starts with /ɒ/ vowel sound
- a one-euro coin — "one" starts with /w/ sound (consonant)
- an MBA — the letter M is pronounced "em", a vowel sound
- a YouTube channel — "Y" makes a /juː/ sound (consonant)
- an FBI agent — "F" is pronounced "ef", starting with a vowel sound
| Article | Used Before | Examples |
|---|---|---|
| a | consonant sound | a book, a car, a teacher, a university |
| an | vowel sound | an apple, an idea, an hour, an MBA |
The Next Word Decides
A/an depends on the sound of the word that comes directly after it — not on the noun. If you add an adjective, the article may change:
| Without adjective | With adjective |
|---|---|
| an apple | a red apple |
| a car | an old car |
| an hour | a long hour |
| a story | an interesting story |
Countable vs. Uncountable Nouns
❌ Wrong: I need an information. ✅ Right: I need some information.
| Countable (a/an ✓) | Uncountable (no a/an) |
|---|---|
| a pen, an idea, a car | water, money, advice, information |
| a chair, an apple, a friend | furniture, equipment, knowledge |
A/An Means "One"
- A/an is only for one thing. Never use it with plural nouns: a book → books / some books (not
a books). - Use one instead of a/an when the number is important: I have one brother, not two.
- Turkish often leaves out "bir" before jobs: Öğretmenim. English always needs a/an before a singular job: I'm a teacher. In the plural there is no article: We're teachers.
Common Contexts
| Situation | Example |
|---|---|
| Jobs / Professions | I'm a teacher. / She's an engineer. |
| General mentions | I saw a movie last night. |
| Introducing something new | There's a man at the door. |
| Quantities / Measures | A cup of tea, a bottle of water. |
| Frequency expressions | Once a day, twice a week. |
| Fixed phrases | Have a seat. Take a picture. Make a mistake. |
Common Fixed Phrases with A/An
- have a good time — We had a good time at the party.
- take a picture — Can you take a picture of us?
- make a mistake — Don't make a mistake again.
- have a seat — Please, have a seat.
- be in a hurry — I'm in a hurry right now.
- have a look — Let me have a look at that.
- once a day / twice a week — I exercise three times a week.
Examples
Subject
Verb
Auxiliary
Object
Adjective
Adverb
Preposition
Hover over any word to see its role.
subjectSheverbisanobjectengineer
↳ "an" before vowel sound /ɛ/
subjectIverbboughtaadjectivenewobjectlaptop
↳ "a" before consonant sound /n/ (new)
subjectItverbtakesanobjecthour
↳ "an" — silent H, vowel sound
subjectHeverbisaadjectiveuniversityobjectstudent
↳ "a" — "u" makes /juː/ sound
subjectIverbexerciseadverbthree timesaobjectweek
↳ "a" in frequency expressions
Common Mistakes
I am teacher.
→
I am a teacher.
Always use a/an before a singular job name.
She is an university student.
→
She is a university student.
"University" starts with /juː/ — a consonant sound. Use "a".
It's a hour late.
→
It's an hour late.
"Hour" has a silent H — starts with vowel sound /aʊ/. Use "an".
I need an information.
→
I need some information.
"Information" is uncountable. Never use a/an with it.
He's a honest man.
→
He's an honest man.
"Honest" has a silent H → starts with vowel sound /ɒ/. Use "an".
I have a MBA degree.
→
I have an MBA degree.
"M" is pronounced "em" — starts with a vowel sound. Use "an".
She is a engineer.
→
She is an engineer.
"Engineer" starts with vowel sound /ɛ/. Use "an".
I have a cars.
→
I have a car. / I have cars.
A/an = one. It can't go with a plural noun.
She has an new phone.
→
She has a new phone.
The article matches the next word: "new" starts with /n/ → a.
They are a doctors.
→
They are doctors.
Plural jobs take no article.