Artigos em inglês: a, an, the e artigo zero
Os artigos são as palavras mais frequentes do inglês, mas suas regras têm nuances que confundem até estudantes avançados. Este guia cobre todos os padrões essenciais com exemplos reais para estudar e pesquisar.
48 items · 6 topics
"a + consonant sound"
Use "a" before words that begin with a consonant sound
"She bought a car. He wants a university degree."
"an + vowel sound"
Use "an" before words that begin with a vowel sound
"It was an honest mistake. He is an NBA player."
"a European / a union"
"e" sounds like "y" here — a consonant sound — so use "a"
"She is a European citizen. It was a unique opportunity."
"an hour / an heir"
Silent "h" creates a vowel sound, so use "an"
"Wait an hour. He is an heir to the fortune."
"a one-way street"
"one" begins with the consonant "w" sound
"Take a one-way street. It was a once-in-a-lifetime chance."
"a / an for first mention"
Introduce a countable singular noun for the first time
"I saw a dog in the park. The dog was barking loudly."
"a / an meaning "one""
"A" can mean one single item in a group
"Could I have a glass of water? I need a minute."
"a / an with jobs"
Use "a / an" to describe someone's profession
"She is a doctor. He wants to be an engineer."
"the — second mention"
Use "the" when the noun has already been introduced
"I bought a book. The book was excellent."
"the — unique things"
Use "the" for things that are one of a kind
"The sun rises in the east. The president spoke today."
"the — superlatives"
"The" always precedes superlative adjectives
"She is the tallest in her class. It was the best film I've seen."
"the — ordinal numbers"
Use "the" before ordinals like first, second, third
"He finished in the third place. She won the first prize."
"the — geographic features"
Oceans, rivers, mountain ranges, and deserts take "the"
"The Amazon flows through Brazil. The Alps are stunning."
"the — with of-phrases"
"The" is used when a noun is followed by a defining of-phrase
"The capital of France is Paris. The idea of the century."
"the — inventions and instruments"
Use "the" when referring to an invention or musical instrument in general
"The telephone changed communication. She plays the violin."
"the — shared knowledge"
Use "the" when both speaker and listener know which one is meant
"Can you close the window? I'll meet you at the station."
"no article — plural generics"
No article when making a general statement about all things of a type
"Dogs are loyal animals. Books expand your mind."
"no article — uncountable generics"
Uncountable nouns used in a general sense take no article
"Water is essential for life. Music soothes the soul."
"no article — meals"
Names of meals used generically take no article
"What did you have for breakfast? We skipped lunch."
"no article — languages"
Language names alone take no article
"She speaks Japanese. He is learning Arabic."
"no article — sports & games"
Names of sports and games take no article
"They play football every Sunday. She loves chess."
"no article — most countries & cities"
Singular country and city names generally take no article
"He lives in Japan. They visited Rome last year."
"no article — academic subjects"
Subjects studied at school or university take no article
"She is studying mathematics. He failed chemistry."
"no article — transport phrases"
"By" + transport takes no article
"They travelled by train. She goes to work by bike."
"*I have headache."
Countable singular nouns need an article
"Correct: I have a headache. She has a temperature."
"*She is best student."
Superlatives require "the"
"Correct: She is the best student in the class."
"*The life is short."
Abstract nouns used generically take no article
"Correct: Life is short. Love is powerful."
"*I go to the school."
"School/hospital/prison" with no article = purpose, not place
"Correct: She goes to school. (She is a student.) / The school was renovated."
"*He plays the football."
Sports names take no article
"Correct: He plays football. They enjoy tennis."
"*She told me a good news."
"News" is uncountable — never use "a/an"
"Correct: She told me some good news. The news was surprising."
"*I visited the France."
Most country names take no article
"Correct: I visited France. He lives in Germany."
"*Can I have an advice?"
"Advice" is uncountable — never use "a/an"
"Correct: Can I have some advice? She gave me useful advice."
"countable singular → a / an"
A singular countable noun always needs an article (or other determiner)
"Give me a pen. I need an umbrella. He wants a raise."
"countable plural → the / ∅"
Plural countable nouns use "the" for specific reference, or no article for general
"The books on the table are mine. Books are knowledge."
"uncountable → the / ∅"
Uncountable nouns use "the" for specific reference, or no article for general
"The water in this glass is cold. Water is essential."
"proper nouns → mostly ∅"
Names of people, cities, and most countries take no article
"Einstein changed physics. Paris is beautiful. Spain is sunny."
"abstract nouns → usually ∅"
Abstract nouns in a general sense need no article
"Happiness is contagious. Freedom matters. Hope sustains us."
"the + plural country name"
Countries with plural names or "united / republic / kingdom" take "the"
"The United States, the Netherlands, the Philippines."
"a / the + adjective + noun"
Articles come before the adjective, not the noun
"She wore a beautiful dress. He drove the old car."
"no article — "go to bed / work / hospital""
Fixed phrases about activities or institutions omit articles
"She went to bed early. He is in hospital. We go to work."
"the — with adjectives as nouns"
"The" + adjective can refer to a group of people
"The elderly need more support. The rich get richer."
"a / an — with uncountables"
"A/an" with uncountables signals a portion or type
"Would you like a coffee? (a cup) That was a kindness she would never forget."
"the — with decades"
"The" is used before decade names
"Music was different in the 1980s. She grew up in the sixties."
"a / an — exclamations with "what""
"What a/an + singular noun" in exclamations
"What a coincidence! What an incredible performance!"
"the — with comparative constructions"
"The more… the more…" uses "the" in a parallel structure
"The harder you work, the luckier you get."
"a — distributive use"
"A/an" expresses rate or distribution
"She earns £50 a day. He visits twice a week."
"the — with named groups"
"The" with nationality adjectives refers to the whole nation
"The Japanese are known for punctuality. The French love cuisine."
"a / an — first vs. the — category"
"A/an" classifies; "the" identifies a specific one
"A whale is a mammal. (class) / The whale we saw was huge. (specific)"
Perguntas frequentes
Qual é a diferença entre "a" e "an"?
"A" é usado antes de palavras que começam com som consonantal, e "an" antes de palavras que começam com som vocálico. O que importa é o som, não a ortografia. "A university" (soa como "yoo") e "an hour" (h mudo, soa como "aur") são exemplos clássicos.
Quando uso "the" em vez de "a"?
Use "a/an" ao introduzir um substantivo pela primeira vez ou quando ele é um entre muitos. Use "the" quando o substantivo já é conhecido pelo falante e pelo ouvinte, quando é único ou identificado pelo contexto: "the sun", "the president", "the book I gave you".
O que é o artigo zero e quando é usado?
O artigo zero significa não usar nenhum artigo. É usado com substantivos plurais ou incontáveis em sentido geral ("Books are expensive"), com a maioria dos nomes próprios, refeições, idiomas, esportes e em expressões fixas como "go to bed" ou "travel by train".
Por que alguns países levam "the" e outros não?
A maioria dos nomes de países no singular não leva artigo: France, Japan, Brazil. Porém, países com nomes plurais ou títulos oficiais que contêm "united", "republic" ou "kingdom" levam "the": the United States, the Netherlands, the United Kingdom.
Como parar de cometer erros com artigos?
A abordagem mais eficaz é a exposição massiva ao inglês real por meio de leitura e escuta. Ao encontrar um substantivo, pergunte-se: é específico ou geral? Contável ou incontável? Com prática e input compreensível, o uso correto dos artigos se torna automático.
Ouvir os artigos em contexto real é a forma mais rápida de usá-los de forma natural.
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