Articles are the small words in front of a noun: a, an and the. English gives you three options, and the third one is to use nothing at all. Choosing between them is one of the hardest things in English for anyone whose first language has no articles - Russian, Polish, Mandarin, Japanese and many others manage perfectly well without them. The good news: the system is small, and a few clear rules cover most of what you will ever say.

The three choices

Every time you put a noun in a sentence, you are choosing between three things:

Compare the three in one set:

• I bought a book. (one book, you do not know which)
• I bought the book. (a specific book we both know about)
• I like books. (books in general, no single item)

One idea sits underneath all three: countable versus uncountable. Countable nouns can be counted and have a plural (one dog, two dogs); uncountable nouns cannot (water, music, information - never waters in the everyday sense, never two musics). This matters because a and an only ever go with singular countable nouns. You can say a problem but not an information - for uncountable nouns the choice is between the and the zero article.

A and an: the indefinite article

Use a or an with a singular countable noun when it is not specific, or when you mention it for the first time. A dog ran past. I need a pen. She is a teacher.

The choice between a and an depends on sound, not spelling. This is the rule learners most often get wrong, because they look at the first letter instead of listening to the first sound.

• Use a before a consonant sound: a cat, a house, a job.
• Use an before a vowel sound: an apple, an egg, an idea.

The tricky cases are where the letter and the sound disagree:

Say the word out loud. If your mouth opens on a vowel sound, use an.

A second job of a and an is to introduce something for the first time. The first time a thing appears it is new to the listener, so it takes a or an; after that it is known, so it switches to the. A car stopped outside. The car was bright red. This first-mention-then-the pattern runs through almost every story and explanation in English.

The: the definite article

Use the when the noun is specific - when both you and the listener know exactly which one you mean. The works with singular, plural and uncountable nouns alike (the cat, the cats, the water).

You use the in these situations:

• Second mention. Once a thing is introduced, it becomes known. I saw a man. The man was carrying a dog.
• Only one of it exists. the sun, the moon, the sky, the internet, the Queen, the government.
• The listener already knows which one. Can you shut the door? (the door of this room - there is no doubt which one).
• Superlatives and ordinals. the best, the biggest, the first, the last, the only.
• Certain place types and named groups. Rivers, seas, deserts and mountain ranges (the Thames, the Atlantic, the Sahara, the Alps), and country names that are groups or contain a common noun (the UK, the USA, the Netherlands).

The zero article: using no article

Often the correct choice is to use no article at all. This is the zero article, and it is not laziness - it is a deliberate option with its own rules.

Use no article with:

• General plural nouns. Dogs are loyal. Cars pollute. Children grow fast. You are talking about the whole class of thing, not specific ones.
• Uncountable nouns in general. I like music. Water is essential. She gives good advice.
• Most countries, cities and continents. France, Spain, Tokyo, Africa. (The exceptions with the are the groups above: the UK, the USA.)
• People's names. Maria called. I spoke to Mr Smith.
• Languages. He speaks Spanish. I am learning Mandarin.
• Meals. We had lunch. Breakfast is ready.

The same noun can take all three options depending on meaning:

• Coffee is grown near the equator. (coffee in general - zero article)
• I bought a coffee. (one cup - indefinite)
• The coffee is cold. (this specific coffee - definite)

A simple decision table

When you are stuck, ask three questions in order.

Most decisions fall out of those three checks. Run _I saw ___ elephant at ___ zoo_ through them: an elephant (one, non-specific, vowel sound) at the zoo (a specific, known place).

Common mistakes

Ranked by how often they actually appear:

1. Dropping articles completely. Speakers of article-free languages say I am student or I have car. English needs one: I am a student. I have a car. This is the single most common error.
2. Using a or an by the letter instead of the sound. An university, a hour, an European are all wrong. It is a university, an hour, a European - listen to the first sound, not the spelling.
3. Overusing the with general plurals. I like the dogs means specific dogs you can both see. If you mean dogs in general, drop the article: I like dogs. The same trap hits the life is hard (should be life is hard) and the nature (should be nature).
4. Adding the to names, languages and meals. the Spanish (the language), the Maria, the breakfast are wrong. Say Spanish, Maria, breakfast.

A note for the variety-conscious: there is no British versus American difference worth flagging here. The article rules above hold in both.

Practice

Choose a, an, the or no article (-). Answers are below.

1. She is ___ engineer at ___ Google.
2. I love ___ music, especially ___ jazz.
3. We waited for ___ hour, but ___ bus never came.
4. ___ sun was setting over ___ Atlantic.
5. He is ___ honest man and ___ best teacher in ___ school.

Answers: 1. an engineer, - Google (company names take no article) 2. - music (general), - jazz (general) 3. an hour (silent h, vowel sound), the bus (a specific bus we are waiting for) 4. The sun (only one), the Atlantic (seas take the) 5. an honest man (silent h), the best (superlative), the school (a specific, known school)