B2 · 中上級 チャプター 4

Explaining Why: Cause and Purpose

2 トータルルール
21 例文
5 分
このチャプターのルール クイック練習

Chapter in 30 Seconds

Master the art of expressing intent and purpose to sound more articulate and professional in Portuguese.

  • Distinguish between simple and complex purpose structures.
  • Apply the subjunctive mood to express the intentions behind actions.
  • Navigate the nuances of 'para' vs 'para que' across regional variants.
Connect your actions to your goals with precision.

学べること

Ready to dive deeper into Portuguese and sound truly authentic? In this B2 chapter, we're unlocking the power of explaining *why* and *for what purpose*. No more guessing! You'll learn to perfectly choose between porque, por causa de, visto que, and como to articulate reasons with native-like precision. Imagine seamlessly explaining why you love Portuguese food, or subtly justifying a decision in a work conversation – the right connector makes all the difference! But it's not just about cause; we're also mastering purpose. You'll discover the elegant dance between para + infinitive and para que + subjunctive. This means you can confidently express your own goals (

I study *to learn*
) and the intentions behind actions you take for others (
I bought this gift *so that they would be happy*
). By the end, you won't just communicate; you'll strategize your words, fine-tuning every explanation. Get ready to connect ideas, influence understanding, and elevate your Portuguese to a whole new level!

Learning Objectives

By the end of this chapter, you will be able to:

  1. 1
    By the end you will be able to: Use 'para' with infinitives for personal goals and 'para que' with the subjunctive to express intentions for others.

チャプターガイド

Overview

Welcome to your next step in mastering Portuguese grammar B2! This chapter is designed to elevate your communication by focusing on the crucial skill of explaining *why* and *for what purpose*. At the CEFR B2 Portuguese level, you're moving beyond basic communication to express nuanced ideas and complex relationships between events.
Understanding how to articulate cause and purpose isn't just about sounding more natural; it's about conveying your thoughts with precision and impact. Imagine confidently justifying your opinions or clearly stating your intentions – that's the power you'll unlock here.
We'll dive deep into the various ways to express because in Portuguese, exploring the subtle differences between porque, por causa de, visto que, and como. These aren't interchangeable; each has its own context and nuance, helping you sound truly authentic. Beyond just causes, we'll also master the art of expressing purpose.
You'll learn the elegant dance between para + infinitive and para que + subjunctive, allowing you to clearly communicate your goals and the intentions behind your actions, whether for yourself or for others. Get ready to connect your ideas like a native speaker!

How This Grammar Works

In Portuguese, explaining *why* something happens or *for what reason* is fundamental for B2-level communication. We use several structures to express cause. The most common is porque (because), which introduces a clause explaining the reason.
For example: Eu estou feliz porque aprendi português. (I am happy because I learned Portuguese.) When the cause is a noun or a noun phrase, we use por causa de (because of / due to). Consider: Não fui à festa por causa da chuva. (I didn't go to the party because of the rain.)
For more formal or literary contexts, or when the reason is already known or obvious, we can use other Portuguese causal conjunctions like visto que (since / given that) or como (as / since). These often appear at the beginning of a sentence. For instance: Visto que o prazo acabou, não podemos aceitar o seu pedido. (Given that the deadline has passed, we cannot accept your request.) or Como estava cansado, fui dormir cedo. (As I was tired, I went to sleep early.)
Now, let's talk about expressing purpose in Portuguese. When the subject of the main verb is the same as the subject of the purpose, we use para followed by the infinitive verb. This covers the rule "Expressing Purpose: Using 'Para'".
For example: Estudo para passar no exame. (I study to pass the exam.) Here, I am studying, and I will pass the exam. However, when the subject of the main verb is *different* from the subject of the purpose, we use para que followed by the subjunctive mood. This is crucial for expressing a desired outcome for someone else or a general intention.
For example: Eu comprei um presente para que ela ficasse feliz. (I bought a gift so that she would be happy.) The I bought, but she would be happy. This distinction is key for accurate and elegant expression.

Common Mistakes

  1. 1✗ Wrong: Eu não fui à praia porque a chuva.
✓ Correct: Eu não fui à praia por causa da chuva.
*Explanation:* Porque introduces a full clause with a verb (e.g., *porque choveu*). When the reason is a noun or noun phrase (like a chuva), you must use por causa de.
  1. 1✗ Wrong: Eu trabalho duro para minha família ter uma vida melhor.
✓ Correct: Eu trabalho duro para que minha família tenha uma vida melhor.
*Explanation:* The subject of trabalho (I) is different from the subject of ter (my family). When the subjects are different in a purpose clause, you must use para que followed by the subjunctive mood (tenha instead of ter).

Real Conversations

A

A

Porque você está aprendendo português? (Why are you learning Portuguese?)
B

B

Estou aprendendo porque quero viajar pelo Brasil. (I'm learning because I want to travel through Brazil.)
A

A

Por que você comprou tantos livros? (Why did you buy so many books?)
B

B

Comprei para que meus alunos tivessem mais material de estudo. (I bought them so that my students would have more study material.)
A

A

Visto que o trânsito está terrível, vamos de metrô. (Given that the traffic is terrible, let's go by subway.)
B

B

Boa ideia! Assim chegamos a tempo para a reunião. (Good idea! That way we arrive on time for the meeting.)

Quick FAQ

Q

What's the main difference between porque and por causa de?

Porque introduces a full clause with a verb (a reason). Por causa de introduces a noun or noun phrase (a cause).

Q

When should I use para + infinitive versus para que + subjunctive?

Use para + infinitive when the subject of the main action is the same as the subject of the purpose. Use para que + subjunctive when the subjects are different.

Q

Are visto que and como interchangeable with porque?

They can introduce a cause like porque, but visto que and como often imply the reason is already known or serve a more formal tone, and they frequently start sentences.

Q

Can I use para with a noun to express purpose?

Yes, you can use para with a noun to express purpose, meaning for or intended for, e.g., Este presente é para você. (This gift is for you.)

Cultural Context

Native Portuguese speakers use these connectors constantly to weave together their thoughts. Porque is ubiquitous in everyday conversation, while por causa de offers a slightly more direct, sometimes emphatic, explanation for an event. Visto que and como lean towards more formal or written contexts, often signaling a logical deduction.
The distinction between para + infinitive and para que + subjunctive is crucial for politeness and clarity, especially when discussing intentions or requests involving others. Mastering these subtleties will not only improve your grammar but also make your communication feel much more natural and precise in any Portuguese-speaking environment.

重要な例文 (2)

1

Vou sair mais cedo para não pegar trânsito.

渋滞に巻き込まれないように、早めに出発します。

目的の表現: 'Para' と 'Para Que' の使い分け
2

Ela postou a foto para que o ex visse.

彼女は元カレに見せるために写真を投稿しました。

目的の表現: 'Para' と 'Para Que' の使い分け

ヒントとコツ (2)

🎯

接続法のスイッチ 'Que'

目的を表すフレーズに 'que' が入ったら（para que, a fim de que）、脳を即座に「接続法モード」に切り替えましょう。
Para que você não esqueça.
frontend.learn_grammar.from_rule: 目的の表現: 'Para' と 'Para Que' の使い分け
🎯

「Pra」を使いこなそう

ブラジルでは、会話の中で 'para' はほぼ常に 'pra' と発音されます。これを使うだけで、一気にネイティブらしい自然な響きになりますよ。Vou pra academia.
frontend.learn_grammar.from_rule: ポルトガル語で目的を表現する (Para)

重要な語彙 (5)

a fim de in order to para que so that objetivo goal/objective intuito intention/aim visando aiming at

Real-World Preview

briefcase

Professional Planning

Review Summary

  • Para + Infinitivo vs Para que + Subjuntivo
  • A fim de + Infinitivo

よくある間違い

After 'para que', you must use the subjunctive mood, not the indicative.

Wrong: Eu estudo para que eu aprendo.
正解: Eu estudo para que eu aprenda.

If the subject is the same, avoid the clunky 'para que' and use 'para' + infinitive.

Wrong: Eu faço isso para que eu fico feliz.
正解: Eu faço isso para ficar feliz.

You cannot follow 'para que' directly with an infinitive; keep it simple with just 'para'.

Wrong: Ele trabalha para que ter dinheiro.
正解: Ele trabalha para ter dinheiro.

Next Steps

You have conquered the 'why' of Portuguese! Keep building these complex sentences and you will be speaking like a native in no time.

Journaling about your daily goals

Continue to: Expressing Intensity and Logical Results

クイック練習 (6)

文法的に正しい文章を選んでください。

主語が異なる場合の目的を正しく表しているのはどれ？

✓ Correct! ✗ Not quite. Correct answer: Abri a porta para que o gato entrasse.
'Para que' の後は接続法（entrasse）が必要です。 'entrasse' は接続法過去の形です。

frontend.learn_grammar.from_rule: 目的の表現: 'Para' と 'Para Que' の使い分け

接続法の誤りを修正してください。

Find and fix the mistake:

Eu fiz o jantar para que você pode comer.

✓ Correct! ✗ Not quite. Correct answer: Eu fiz o jantar para que você pudesse comer.
主節が過去形 'fiz' なので、para que の後は接続法過去の 'pudesse' にする必要があります。

frontend.learn_grammar.from_rule: ポルトガル語で目的を表現する (Para)

正しい接続詞または動詞の形を選んでください。

Eu trabalho muito ___ ter dinheiro para viajar.

✓ Correct! ✗ Not quite. Correct answer: para
主語が同じ（私）なので、シンプルに前置詞 'para' ＋ 不定詞を使います。

frontend.learn_grammar.from_rule: 目的の表現: 'Para' と 'Para Que' の使い分け

文法的に正しい文を選んでください。

正しい目的の表現を選びましょう：

✓ Correct! ✗ Not quite. Correct answer: Eu trouxe o livro para você ler.
口語や一般的な表現では、para + 主語 + 不定詞（人称不定詞）が主語が異なる場合に非常によく使われます。

frontend.learn_grammar.from_rule: ポルトガル語で目的を表現する (Para)

文章の間違いを直してください。

Eu te chamei para que você me ajuda.

✓ Correct! ✗ Not quite. Correct answer: Eu te chamei para que você me ajude.
'para que' の後は接続法が必要です。 'ajuda' は直説法なので、接続法現在の 'ajude' に直します。

frontend.learn_grammar.from_rule: 目的の表現: 'Para' と 'Para Que' の使い分け

空欄に 'para' または 'para que' を入れてください。

Eu trabalho muito ____ comprar uma casa.

✓ Correct! ✗ Not quite. Correct answer: para
「働く」のも「買う」のも主語が 'Eu' で同じなので、para + 不定詞を使います。

frontend.learn_grammar.from_rule: ポルトガル語で目的を表現する (Para)

Score: /6

よくある質問 (4)

'para' は目標（学ぶために勉強する）を指し、 'por' は原因（親のために勉強する）を指します。
Eu estudo para aprender.
と
Eu estudo por causa dos meus pais.
を比べてみてください。 未来を向いているのが 'para'、過去を向いているのが 'por' と考えると分かりやすいですよ。
文法的には可能ですが、くどくて不自然に聞こえます。
Eu como para que eu sobreviva
と言うより、
Eu como para sobreviver.
と言う方がずっと自然です。 主語が同じなら 'para' ＋ 不定詞を使いましょう。
もちろんです！目的だけでなく、目的地
Vou para o Rio
や受取人 Isto é para você も表せます。
接続法は願望や不確実性を表すからです。「〜のために」という目的は、まだ実現していない「願い」のニュアンスを含むため、
para que você ouça
のように接続法になります。
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Clarifying Subjects with the Personal Infinitive
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Expressing Intensity and Logical Results
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