Articles

A and an

Use a/an with singular countable nouns when the thing is not yet specific or known.

I saw a dog outside.

Use an before a vowel sound:

an apple

an idea

an hour

Use a before a consonant sound:

a car

a university

The spelling is less important than the sound.

Introduce something for the first time

I bought a book yesterday.

After the book has been introduced:

The book is about climate change.

The

Use the when the listener or reader can identify which specific thing you mean.

Close the door.

Use it when something has already been mentioned:

I saw a film yesterday. The film was excellent.

It is also used with things understood to be unique in the context:

the sun

the internet

the government

No article

Plural and uncountable nouns often have no article when speaking generally.

Dogs are social animals.

Compare:

The dogs are outside.

Similarly:

Education is important.

But:

The education he received was excellent.

Countable and uncountable nouns

Countable:

one book

two books

Singular countable nouns normally need a determiner:

I bought a book.

Uncountable nouns include:

• information
• advice
• research
• furniture
• equipment
• homework

You cannot normally say:

an information

or:

two advices

Instead:

some information

a piece of advice

Technology has changed education.

No article is needed because technology and education are being discussed generally.

Compare:

The technology used in this classroom is outdated.

Now we mean specific technology.

Ask:

1. Is it countable or uncountable?
2. Is it singular or plural?
3. Am I talking about something general or specific?
4. Has it already been introduced?
5. Can the reader identify exactly what I mean?

Incorrect: I need an advice.

Correct: I need some advice.

or: I need a piece of advice.

Incorrect: Teacher gave us homework.

Correct: The teacher gave us homework.

Incorrect: The social media affects young people.

Usually better: Social media affects young people.

Incorrect: She studies at an university.

Correct: She studies at a university.

Choose the best option:

I read ___ interesting article yesterday. ___ article discussed artificial intelligence in schools.

• A. the / A
• B. an / The
• C. an / An
• D. a / A

Answer: B. The article is introduced with an and then becomes specific, so the second reference uses the.

• Use a/an for singular countable nouns that are not yet specific.
• Use the when the reader can identify what you mean.
• Use no article for many general plural and uncountable nouns.
• Singular countable nouns normally need a determiner.
• Whether to use a or an depends on sound, not spelling.
• Learn which common English nouns are uncountable.