UNIT 64 The indefinite article: a / an

A – Form and Pronunciation

In English, the indefinite article has two forms: a and an. Both forms refer to a singular countable noun that is not specific or previously identified. Unlike Portuguese, where articles vary according to gender (um / uma), English uses the same form for all nouns, regardless of gender.

The choice between a and an depends on the sound that begins the following word, not the spelling. This phonetic rule is fundamental for pronunciation clarity and rhythm in English.

English Literature	Pop Song Lyrics
“The old sailor carries a lantern through the fog, hoping its faint glow guides him safely to the harbor.” Here, a appears before the consonant sound in “lantern”. The Old Man and the Sea (1952), Ernest Hemingway / American	“I found an answer in the silence of the night.” The article an appears before the vowel sound of “answer”. Song: “Silent Answers”, Norah Jones – Album The Fall (2009)

a book
a house
a university
an apple
an hour
an honest person

Observe that words beginning with the sound /ju/ use a: a university, a European country. Words with a silent h use an: an hour, an honest person.

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B – Introducing a New Person or Thing

The indefinite article is commonly used when we introduce a person or object for the first time in a story or conversation. The speaker refers to something that is not yet known to the listener.

English Literature	Pop Song Lyrics
“One evening, a stranger arrives at the village carrying a mysterious letter.” The article introduces a new character not previously mentioned. The Moonstone (1868), Wilkie Collins / British	“I saw a girl dancing alone beneath the neon lights.” The noun refers to an unspecified person. Song: “Neon Nights”, Dua Lipa – Album Future Nostalgia (2020)

She gave me a red rose.
I met a traveler from Spain.
He bought a new jacket.

In Portuguese we would say: “Ela me deu uma rosa vermelha”. The article “uma” plays a similar role.

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C – Professions and Roles

The indefinite article appears before professions, occupations, and social roles. English grammar requires an article in these contexts, while Portuguese may omit it.

English Literature	Pop Song Lyrics
“My father was a teacher, a man who believed that knowledge shapes the soul.” The article precedes the profession “teacher”. To Kill a Mockingbird (1960), Harper Lee / American	“She dreams of becoming a dancer on the greatest stages of the world.” The profession appears with the indefinite article. Song: “Dream Stage”, Alicia Keys – Album Girl on Fire (2012)

He is an engineer.
She is a journalist.
My sister is a doctor.

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D – Expressions of Quantity, Price, and Frequency

The indefinite article is also used in certain numerical expressions and measurements. In these cases, a or an functions similarly to the word “per”.

English Literature	Pop Song Lyrics
“The carriage moved slowly, no faster than ten miles an hour, along the dusty road.” The article forms a measurement expression. Great Expectations (1861), Charles Dickens / British	“I call your name three times a day, hoping you will hear.” The phrase expresses frequency. Song: “Call My Name”, The Weeknd – Album After Hours (2020)

three times a day
50 miles an hour
five dollars a kilo

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E – Exclamations and Expressions

The indefinite article also appears in exclamations before singular nouns. These expressions emphasize emotion, surprise, admiration, or frustration.

English Literature	Pop Song Lyrics
“What a strange night this is,” she whispered, staring at the silent forest. The article appears in an emotional exclamation. Wuthering Heights (1847), Emily Brontë / British	“What a beautiful day to feel alive!” The structure intensifies emotion in the lyric. Song: “Beautiful Day”, U2 – Album All That You Can’t Leave Behind (2000)

What a life!
What a terrible mistake!
What a wonderful surprise!

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F – A Certain Someone

Sometimes the indefinite article appears before a surname (Mr / Ms + name) to indicate an unidentified or unfamiliar person. This structure suggests that the speaker does not personally know the individual.

English Literature	Pop Song Lyrics
“A Mr. Thompson called earlier, but he left no message.” The phrase indicates an unknown person with that surname. The Secret Agent (1907), Joseph Conrad / Polish-British	“Somebody said a Mr. Jones was waiting by the door.” The article signals that the identity is not fully known. Song: “Mr. Jones”, Counting Crows – Album August and Everything After (1993)