Nouns & Determiners
A, An, The or No Article: Rules and Exercises
Updated
Use a or an for one unspecified member of a countable group, the when the listener can identify what you mean, and no article for many general plural or uncountable nouns. The choice depends on meaning as well as grammar: "I need a key" asks for any suitable key; "I need the key" points to an identifiable one.
A four-step decision chart
First find the noun, then check the whole noun phrase. In "an unusually quiet room", the article belongs to room, but its sound choice depends on unusually. Do not choose an article from the noun spelling alone.
| Check | Choice | Example |
|---|---|---|
| Already has my, this, each or another determiner? | Usually no extra article | This application is complete. |
| Can the listener identify the particular person or thing? | Usually the | Please close the window beside you. |
| One unspecified singular countable thing? | A or an | We need a volunteer. |
| Plural or uncountable noun used generally? | Usually no article | Volunteers need patience. |
- A singular countable common noun normally needs a determiner: a ticket, the ticket, my ticket or this ticket.
- The works with singular, plural and uncountable nouns: the desk, the desks, the furniture.
- Names and fixed expressions have their own patterns; check the sections below.
A or an: listen to the next sound
Use a before a consonant sound and an before a vowel sound. Letters are only a clue. University starts with a /y/ sound, while the h in hour is silent. If an adjective comes next, listen to that adjective.
| Use a | Use an |
|---|---|
| a university course | an online course |
| a useful suggestion | an unusual suggestion |
| a one-day visit | an eight-day visit |
| a European city | an hour-long meeting |
| a USB cable (you-ess-bee) | an MBA course (em-bee-ay) |
- Say "a hotel" when you pronounce the h. Some accents and older expressions vary.
- Acronyms follow pronunciation: "an MRI scan" but "a NATO meeting".
- Use a/an for jobs: "My neighbour is an architect."
When the listener knows which one
A noun can be identifiable because you mentioned it earlier, because both people can see it, or because a phrase makes the reference clear. First mention does not automatically require a: "The kitchen is downstairs" works when you are showing someone around one particular home.
Compare "I bought a notebook. The notebook has numbered pages." The second mention points back to the notebook you introduced. Now compare "The notebook on your chair is mine." The identifying phrase can make the reference clear without an earlier mention.
- Shared situation: "Could you turn down the radio?"
- A clearly identified group: "The students in Room 6 are taking a test."
- An identified amount of something uncountable: "The advice you gave me was helpful."
- Superlatives and order: "the quickest route", "the second attempt". Possessives can replace the article: "my best result".
No article: general ideas and everyday expressions
General plural nouns and uncountable nouns often need no article: "Bicycles save space" and "Music helps me relax". Adding the narrows the reference: "The bicycles outside belong to our guests."
Do not add a/an to an uncountable noun in its uncountable meaning. Say "some equipment" or "a piece of equipment". A noun can change meaning: "Coffee keeps me awake" describes the drink; "two coffees" means two servings.
| Pattern | Example | Contrast |
|---|---|---|
| Languages and school subjects | She studies Arabic and chemistry. | The chemistry in this chapter is difficult. |
| Meals used as daily routines | We usually eat breakfast at seven. | We enjoyed a late breakfast. |
| Transport with by | He travels by train. | He is on the train to Leeds. |
| Institution as its usual activity | The children are at school. | I waited outside the school. |
| Sport or activity | They play tennis after work. | The tennis match starts soon. |
- British English often uses "in hospital" for a patient; American English commonly uses "in the hospital".
- Do not assume every institution follows the same pattern: ordinary expressions include "at the office" and "at the supermarket".
Names, places and common mistakes
Most personal names, city names and individual country names take no article: Lina, Nairobi, Canada. Some names conventionally include the: the Netherlands, the United States, the Nile and the Alps. Learn the full expression instead of forcing every name into one rule.
| Avoid in the intended meaning | Use | Reason |
|---|---|---|
| She gave me an advice. | She gave me some advice. | Advice is uncountable here. |
| He is engineer. | He is an engineer. | A singular job noun needs a determiner. |
| The my bag is missing. | My bag is missing. | Do not combine the with my. |
| I enjoy the music. (all music) | I enjoy music. | General uncountable meaning takes no article. |
| We waited a hour. | We waited an hour. | Hour begins with a vowel sound. |
- For rivers, seas and mountain ranges, the is common: the Atlantic, the Himalayas.
- Individual mountains and lakes with Mount or Lake usually have no article: Mount Kenya, Lake Geneva.
- A proper name can become a countable description: "There are two Sams in our class." Meaning controls the choice.
Use the rules in a short paragraph
Model: "I joined a course last month. The course meets in an old library. Our teacher gives us advice about writing. After class, I take the bus home."
A course introduces something new. The course refers back to it. An depends on the vowel sound in old. Advice is uncountable and not limited to an identified set. The bus describes an understood travel service. Write a similar paragraph about your routine, then explain each article choice.
25 practice exercises with explained answers
Choose a, an, the or no article for each blank. Use the context given; no article means leaving the blank empty. Write your answer before opening the explanation.
Mira is ___ dentist.
Show answer and explanation for question 1
Answer: a
Dentist is a singular countable job noun introduced without identifying a particular member.
We booked ___ online lesson.
Show answer and explanation for question 2
Answer: an
Online begins with a vowel sound.
I found a wallet. ___ wallet contained no cards.
Show answer and explanation for question 3
Answer: The
The second sentence refers to the wallet already introduced.
Speaking generally, ___ patience is useful when teaching.
Show answer and explanation for question 4
Answer: no article
Patience is an uncountable quality used generally.
He carries ___ umbrella when rain is forecast.
Show answer and explanation for question 5
Answer: an
Umbrella starts with a vowel sound.
She works at ___ university. We have not said which one.
Show answer and explanation for question 6
Answer: a
University begins with a consonant /y/ sound.
Please open ___ door beside your chair.
Show answer and explanation for question 7
Answer: the
The phrase beside your chair identifies the intended door.
As a general rule, ___ cats need regular exercise.
Show answer and explanation for question 8
Answer: no article
Cats is a plural noun referring to the group generally.
They arrived ___ hour early.
Show answer and explanation for question 9
Answer: an
The h in hour is silent.
We need ___ useful example, not another definition.
Show answer and explanation for question 10
Answer: a
Useful begins with a consonant /y/ sound.
___ my laptop is charging.
Show answer and explanation for question 11
Answer: no article
My already acts as a determiner.
I usually have ___ breakfast at home.
Show answer and explanation for question 12
Answer: no article
Breakfast names the ordinary meal in a routine.
We had ___ excellent breakfast at the hotel.
Show answer and explanation for question 13
Answer: an
A described instance of a meal can be countable; excellent starts with a vowel sound.
She speaks ___ Portuguese fluently.
Show answer and explanation for question 14
Answer: no article
Language names normally take no article.
___ Portuguese spoken in this recording is quite fast.
Show answer and explanation for question 15
Answer: The
The phrase identifies the specific language use in the recording.
He travelled across ___ Netherlands.
Show answer and explanation for question 16
Answer: the
The Netherlands conventionally includes the.
Our cousins live in ___ Peru.
Show answer and explanation for question 17
Answer: no article
Peru normally takes no article.
I need ___ piece of information.
Show answer and explanation for question 18
Answer: a
Piece is singular and countable, even though information is uncountable.
___ information in your email was accurate.
Show answer and explanation for question 19
Answer: The
In your email identifies the relevant information.
She bought ___ one-way ticket.
Show answer and explanation for question 20
Answer: a
One starts with a consonant /w/ sound.
We watched a film. ___ ending surprised everyone.
Show answer and explanation for question 21
Answer: The
The ending is identifiable as the ending of that film.
He applied for ___ MBA programme.
Show answer and explanation for question 22
Answer: an
MBA begins with the vowel sound in the letter name em.
We usually travel by ___ bus.
Show answer and explanation for question 23
Answer: no article
By bus is the normal transport expression.
This is ___ shortest route shown on the map.
Show answer and explanation for question 24
Answer: the
The superlative identifies one route within the stated set.
In general, ___ furniture is expensive to transport.
Show answer and explanation for question 25
Answer: no article
Furniture is uncountable and used generally.
Common questions
Can I use a or an with an uncountable noun?
Not in its uncountable meaning. Use some advice or a piece of advice. Some nouns have a countable meaning in context: a coffee can mean one serving.
Does first mention always take a or an?
No. The is possible on first mention when the listener can identify the referent, as in "Please shut the gate" when both speakers are standing beside one gate.
Why is it a university but an hour?
The choice follows sound: university starts with a consonant /y/ sound, while hour starts with a vowel sound because its h is silent.
Continue practising
Further reading
These references offer additional explanations. The examples and exercises above were written for this guide.
Test Your Knowledge
Articles Quiz
Question 1 of 7
Choose the correct article: "She is ___ honest person."