How to say “I studied this before” in Portuguese

Introduction

Learning how to say I studied this before in Portuguese is a practical skill for learners traveling, studying, or talking about past experience. This article explains natural Brazilian Portuguese phrases, grammar basics, vocabulary, common replies, and useful short dialogues for beginners.

Core phrase and quick meaning

The most direct way to say I studied this before in Brazilian Portuguese is Eu já estudei isso. This sentence uses the verb estudar in the simple past (pretérito perfeito) and the adverb já to mean already or before. Use this when you want to say you have previous study experience with a subject, class, or material.

Breaking down the phrase

Eu = I

já = already / before

estudei = I studied (pretérito perfeito of estudar)

isso = this / that (neutral demonstrative for a concept or thing just mentioned)

Alternative ways to express the same idea

Beginners benefit from seeing multiple natural variants. Each option has a slightly different nuance or formality level.

Eu já estudei isto – formal or slightly more precise demonstrative (isto = this). Useful in classrooms or formal conversations.

Eu já estudei aquilo – that over there; use when referring to something mentioned earlier but not right here.

Eu já fiz esse curso – I already took this course. Use when referring to a specific course or class.

Eu já aprendi isso – I already learned this. Focuses on having learned the material, not just studied it.

Já estudei – short, casual reply meaning already studied. Common in conversations or messages.

When to use pretérito perfeito (estudei) vs. other tenses

Pretérito perfeito, as in estudei, is used for completed actions in the past. Use it when the studying happened and is finished. If you want to emphasize ongoing study in the past or habitual past, you would use other structures, but for beginners, estudei covers most everyday situations.

If you want to say you studied something earlier today or recently, Eu já estudei isso hoje adds the time word hoje (today).

Useful vocabulary related to studying

estudar = to study

aprender = to learn

curso = course

aula = class / lesson

matéria = subject

lição = lesson / homework

trabalho = assignment / paper

prova = test / exam

Simple sample sentences for beginners

Eu já estudei isso na escola – I studied this in school.

Eu já estudei essa matéria semana passada – I studied this subject last week.

Eu já aprendi isso com meu professor – I already learned this with my teacher.

Eu já fiz esse curso online – I already took this online course.

Já estudei, posso ajudar – I already studied it, I can help.

Short beginner-friendly dialogues

Conversation at a class or study group

Professor: Você conhece esse tópico?

Aluno: Eu já estudei isso, mas posso rever se quiser.

Professor: Ótimo, então ajude seu colega.

Conversation with a friend about a course

Amigo: Você vai fazer a prova de gramática?

Você: Sim. Já estudei bastante, mas estou nervoso.

Amigo: Vamos estudar juntos hoje à noite.

Common replies and follow-ups

If someone says Eu já estudei isso, common follow-ups are:

Você aprendeu bem? – Did you learn it well?

Quando você estudou? – When did you study?

Você pode me ajudar? – Can you help me?

Use simple replies:

Sim, aprendi – Yes, I learned it.

Estudei semana passada – I studied it last week.

Posso explicar – I can explain.

Politeness and tone: formal vs informal

Brazilian Portuguese has informal and neutral registers. For classmates and friends, short forms like Já estudei or Eu já estudei isso are fine. In formal settings, add pronouns or polite verbs:

Eu já estudei esse assunto, senhor(a) – adding a form of address shows respect.

However, Brazilian classrooms are often casual; saying Eu já fiz esse curso to a coordinator is common and natural.

Common beginner mistakes and how to avoid them

1. Wrong verb tense: Beginners sometimes use the present tense estudar instead of pretérito perfeito. Avoid saying Eu já estudo isso when you mean you studied it in the past. Use estudei.

2. Misplacing já: The adverb já usually comes before the verb but can also come after the subject. Both Eu já estudei and Já estudei are correct. Avoid placing já at the end of the sentence like Eu estudei isso já in casual speech it’s acceptable but less common.

3. Mixing demonstratives: Use isso for something just mentioned, isto for something present or about to be said, and aquilo for something further away. Beginners can safely use isso most of the time.

Practical contexts and real-life examples

At a tutoring center

Recepcionista: Você já fez alguma aula aqui?

Aluno: Eu já estudei isso em outra escola, mas quero revisar.

Ordering help in a store selling study materials

Vendedor: Você procura material de gramática?

Cliente: Sim. Eu já estudei isso, quero algo mais avançado.

Talking about language skills

Entrevistador: Você já estudou português antes?

Candidato: Eu já estudei português por dois anos na universidade.

Extra beginner tips

1. Listen for já and estudei in conversations, podcasts, and videos to get used to the rhythm.

2. Practice swapping objects: Eu já estudei matemática; Eu já estudei inglês; Eu já estudei história. This builds confidence using subject vocabulary.

3. Use short replies in messages: Já estudei works well in chat and voice messages and sounds natural.

Quick recap of key phrases

Eu já estudei isso – I studied this before / I already studied this.

Já estudei – Already studied (short reply).

Eu já fiz esse curso – I already took this course.

Eu já aprendi isso – I already learned this.

Conclusion

Mastering how to say I studied this before in Brazilian Portuguese gives you a practical phrase for classrooms, conversations, and messages. Focus on using Eu já estudei isso, practicing small variations, and listening to native speakers. With these simple patterns and example dialogues, beginners can confidently say they have prior study experience and continue building vocabulary around courses, classes, and subjects.