Minha filha colocou o caderno e a caneta na mochila antes de sair para a escola.

Because filha is a feminine noun, so the possessive has to match it:

• meu filho = my son
• minha filha = my daughter

In Portuguese, possessives agree with the thing possessed, not with the speaker.

Colocou is the preterite (simple past) of colocar and means put / placed.

Here it is:

• eu coloquei = I put
• você/ele/ela colocou = you/he/she put

So Minha filha colocou... means My daughter put... and presents the action as completed.

Because Portuguese normally uses articles more often than English does.

• o caderno = the notebook
• a caneta = the pen

The articles also show gender:

• o for masculine singular nouns
• a for feminine singular nouns

So:

• caderno is masculine
• caneta is feminine

Even if English might just say notebook and pen, Portuguese often naturally says o caderno e a caneta.

Because each noun normally keeps its own article.

So Portuguese says:

• o caderno e a caneta

not usually:

• o caderno e caneta

Repeating the article sounds more natural and standard when referring to two specific items.

Na is a contraction of:

• em = in/on/at
• a = the

So:

• em + a = na

Therefore:

• na mochila = in the backpack

Other similar contractions:

• no = em + o
• nos = em + os
• nas = em + as

After antes de (before), Portuguese uses the infinitive when the subject is the same as in the main clause.

So:

• antes de sair = before leaving / before she left

Here, the person who put the things and the person who left is the same person: minha filha.

This is very common in Portuguese:

• antes de dormir = before sleeping
• antes de estudar = before studying
• antes de viajar = before traveling

Because Portuguese often avoids repeating the subject when it is already clear.

In this sentence, minha filha is the understood subject of both actions:

1. she put the notebook and pen in the backpack
2. she left for school

So antes de sair naturally means before she left / before leaving.

If needed, Portuguese can make the subject explicit, but it is not necessary here.

Here para means to / toward, showing destination.

• para a escola = to school / to the school

So:

• sair para a escola = to leave for school

This is a very common Brazilian Portuguese way to express where someone is headed.

In Brazilian Portuguese, para a escola is very common and natural when talking about going or leaving for school.

You may also see:

• ir à escola
• sair para a escola

They are both possible, but they are not always used in exactly the same way in everyday speech.

A simple learner-friendly way to think about it:

• para a escola emphasizes destination: toward school / for school
• à escola is also correct with verbs of movement, especially in more formal or neutral phrasing

In Brazil, para a escola is extremely common in speech.

Yes. Even though Portuguese uses the article a, the phrase can still simply mean to school in the everyday sense.

So:

• para a escola can mean to school not necessarily to a particular school building that has already been mentioned

Portuguese often uses articles in places where English does not.

Usually put is the most natural translation here.

• colocar = to put / to place

In this sentence, put sounds the most normal in everyday English:

• My daughter put the notebook and the pen in the backpack...

Placed is possible, but it sounds a little more formal or deliberate.

Yes, but the original order is the most neutral and natural.

Original:

• Minha filha colocou o caderno e a caneta na mochila antes de sair para a escola.

You could sometimes move parts around for emphasis, but beginners should stick with the standard pattern:

subject + verb + objects + place + time-related phrase

Here:

• Minha filha = subject
• colocou = verb
• o caderno e a caneta = direct objects
• na mochila = place
• antes de sair para a escola = time/context phrase

Because semantically it fits the verb colocar very naturally:

• colocar algo na mochila = to put something in the backpack

So the sentence is understood as:

• she put the notebook and pen in the backpack
• before leaving for school

If na mochila were meant to describe sair, the sentence would feel odd, because leaving in the backpack does not make sense here.

Sair means to leave / to go out.

In this sentence:

• antes de sair para a escola = before leaving for school

So it does not mean just to exit physically; it means to head out, which is a very common use.

Examples:

• Vou sair agora. = I’m leaving now.
• Ela saiu cedo. = She left early.

In Brazil, pra is a very common spoken contraction of para.

So in everyday speech, many people would say something like:

• antes de sair pra escola

But in careful writing and standard grammar, para is the full form:

• antes de sair para a escola

As a learner:

• understand both
• use para in writing until you feel comfortable with spoken forms

A rough learner-friendly pronunciation might be:

MIN-ya FEE-lya ko-lo-KOH oo ka-DER-no ee a ka-NE-ta na mo-SHEE-la AN-tes djee sa-EER PA-ra a es-KOH-la

A few useful notes:

• minha often sounds close to minya
• filha has the lh sound, similar to the lli in million for many English speakers
• colocou has stress on the last syllable: co-lo-COU
• mochila in Brazil usually has a sh sound: mo-SHEE-la
• de sair often links smoothly in speech

Yes. Pôs is the preterite of pôr (to put) and is also correct:

• Minha filha pôs o caderno e a caneta na mochila...

Both are good, but:

• colocar is often easier for learners because its forms are more regular
• pôr is shorter and very common, but less regular

So colocou is a very learner-friendly and natural choice.