How to Use “Quantos” in Portuguese for Countable Masculine Nouns

Introduction

Learning how to ask and talk about quantities is essential for everyday Portuguese. This article explains how to use Quantos with countable masculine nouns in Brazilian Portuguese. You will learn rules, sentence structure, variations, and natural examples to help you speak and understand real conversations.

What is Quantos and when to use it

Quantos is an interrogative adjective used to ask about quantity of countable masculine nouns. It agrees in gender and number with the noun it modifies. Use quantos when the noun is plural and masculine, for example carros, livros, and amigos. For singular or feminine nouns you use other forms, which we address briefly for comparison.

Basic agreement rules

When using quantos, remember two agreement principles:

1. Gender: quantos for masculine nouns, quantas for feminine nouns.

2. Number: Use the plural form when the noun is plural. For singular you would ask Quanto (masculine) or Quanta (feminine).

Forming Questions with Quantos

Questions with quantos follow simple word order. The most common patterns are:

– Quantos + plural masculine noun + verb?

– Quantos + plural masculine noun + verb + complement?

Examples:

Quantos livros você tem?

Quantos carros existem naquela rua?

Subject and object position

Quantos can modify either the subject or the object in a sentence.

When it modifies the subject, the noun it refers to performs the action:

Quantos alunos chegaram cedo?

Here alunos is the subject: the students arrived.

When it modifies the object, the noun receives the action:

Quantos amigos você convidou?

Here amigos is the object: you invited friends.

Short answers and full answers

Short answers often repeat the noun with a number or use a pronoun. Full answers give a complete sentence with a verb and optionally extra details.

Short answers:

Três.

Dois.

Full answers:

Eu tenho três livros.

Convidei dois amigos para a festa.

Using numerals vs words

In spoken Portuguese people often use numerals or number words interchangeably. Both are acceptable. In writing, numbers may appear as digits or words depending on style.

Quantos participantes vieram?

Vinte.

Vinte participantes vieram.

Quantos with verbs in different tenses

Quantos works with any tense because it only asks about quantity. The verb that follows should match the tense you need.

Present tense:

Quantos livros você lê por mês?

Past tense (pretérito perfeito): Quantos livros você leu no ano passado?

Future tense: Quantos livros você vai ler este ano?

Examples with common verbs

Quantos amigos você tem?

Quantos filhos ele tem?

Quantos cursos você fez?

Quantos filmes você assistiu?

Negation and Quantos

To ask about a quantity when expecting none or a small number, you can use negation in the answer. The question form with quantos remains the same.

Quantos convites vocês receberam?

Nenhum.

Não recebemos nenhum convite.

Using nada, nenhum, and pouco

Common negative responses include:

Nenhum for masculine singular none (when you repeat the noun: nenhum livro)

Nada typically for things in general (not followed by a masculine plural noun)

Poucos for a small number (masculine plural)

Examples:

Quantos emails você recebeu hoje?

Nenhum.

Quantos problemas surgiram?

Poucos.

Quantos + de + noun: When to use de

Brazilian Portuguese sometimes uses de after quantos in expressions that indicate part of a larger set or a portion. Use de when the construction refers to a subset, often followed by a determiner or noun phrase.

Quantos dos alunos passaram na prova?

Quantos dos livros são novos?

In many cases you can omit de if you ask generally about quantity without specifying a subset:

Quantos alunos passaram na prova? is a general question about how many students passed.

Using quantos with possessives and demonstratives

When a possessive or demonstrative follows the noun, maintain agreement with quantos and place the possessive after the noun:

Quantos carros da empresa são elétricos?

Quantos desses livros você já leu?

Practical examples in everyday contexts

Here are everyday situations where quantos is natural. Each example shows typical vocabulary and phrasing used in Brazil.

At a store:

Quantos produtos estão na promoção hoje?

Temos cinco produtos em promoção.

Planning a trip:

Quantos dias você vai ficar em São Paulo?

Vou ficar sete dias.

Work or school:

Quantos colegas participaram da reunião?

Quinze colegas participaram.

Family:

Quantos primos você tem?

Tenho três primos.

Polite variations and softer questions

To sound more polite or less direct, Brazilians may add por favor, use indirect phrasing, or soften the question with a modal verb:

Você poderia me dizer quantos ingressos restam, por favor?

Você sabe quantos alunos vão participar?

Common mistakes and how to avoid them

Mistake 1: Using quantos with feminine nouns. Remember to switch to quantas for feminine plural nouns.

Wrong: Quantos flores você comprou?

Right: Quantas flores você comprou?

Mistake 2: Forgetting plural agreement. Use Quanto for singular or when asking how much (uncountable).

Wrong: Quantos dinheiro você tem?

Right: Quanto dinheiro você tem?

Mistake 3: Using quantos with uncountable nouns. For uncountable or mass nouns, use Quanto/Quanta instead of quantos or quantas.

Pronunciation tips

Pronounce quantos like kuhn-tos with a soft a, similar to how native Brazilians say it. The stress is on the first syllable QUAN. Practice common phrases:

Quantos anos?

Quantos reais?

Regional and colloquial notes

In Brazil, casual speech often shortens or links words. You might hear quick pronunciations or contractions. The grammar does not change, but spoken rhythm can make sentences sound different from written forms.

Colloquial alternatives include using numbers directly or adding context words:

Tem quantos? meaning How many are there? in very informal contexts.

Questions with Quanto tempo and Quantos anos

For asking about duration, use Quanto tempo, not quantos. For asking about age in years, use quantos because anos is masculine and plural:

Quanto tempo você vai ficar?

Quantos anos você tem?

Combining quantos with other question words

You can combine quantos with question words to ask more specific questions, such as where, when, why, and how:

Quantos livros você comprou ontem na livraria?

Quantos ingressos ainda existem para o show e onde posso comprar?

Indirect questions and reported speech

When reporting a question, keep quantos and adapt the sentence to the reporting verb:

Ela perguntou quantos alunos iriam à excursão.

Ele quer saber quantos carros foram vendidos.

Additional small but important grammar points

Elision and contraction: Prepositions can contract with articles after the noun. For example, quantos + os is rarely used together because an article follows the noun, not quantos directly. Focus on agreement between quantos and the noun, then handle articles and prepositions normally.

Plural irregularities: Some masculine nouns change form in plural irregularly. Agreement with quantos still follows the plural form, so pay attention to the actual plural of the noun.

Quick reference summary

Use quantos when asking about quantity of masculine plural countable nouns.

Switch to Quanto for singular masculine or mass nouns.

Use quantas for feminine plural nouns.

Place quantos before the noun and match the verb tense to your time frame.

Short answers can be just a number or a full sentence for clarity.

Conclusion

Mastering Quantos helps learners ask clear, natural questions about quantity in Brazilian Portuguese. Remember agreement in gender and number, common sentence patterns, and small usage details like de and possessives. With practice and attention to the examples in this article, you will soon use quantos confidently in conversation and comprehension.