O marcador caiu da estante, mas eu ainda lembro da página do capítulo final.

Because de + a contracts to da in Portuguese.

• de = from / of
• a = the (feminine singular)
• de + a = da

So:

• da estante = from the shelf / bookcase

You will see this kind of contraction all the time:

• de + o = do
• de + a = da
• em + a = na
• em + o = no

That is also why the sentence has do capítulo final later on.

For the same reason: de + o = do.

• capítulo is masculine
• its definite article is o
• so de o capítulo final becomes do capítulo final

This phrase means of the final chapter.

So the structure is:

• a página = the page
• da página do capítulo final = of the page of the final chapter

Portuguese uses definite articles much more often than English.

In English, you might say:

• the marker fell from the shelf
• I still remember the page from the final chapter

Portuguese naturally keeps the articles in places where English might sound lighter without them.

Here:

• O marcador = the marker / bookmark
• da página = of the page
• do capítulo final = of the final chapter

This is normal and idiomatic in Portuguese.

Great question. In Brazilian Portuguese, lembrar de is extremely common and often the most natural choice.

So:

• lembrar da página = to remember the page
• literally, it looks like remember of the page, but that is just how Portuguese structures it

You may also see lembrar used without de, especially in more formal or literary language:

• Eu lembro a página — possible, but less common in everyday Brazilian speech
• Eu me lembro da página — also very common
• Eu lembro da página — very common in speech

For a learner of Brazilian Portuguese, lembrar de is the safest everyday pattern.

Yes. Eu lembro da página and eu me lembro da página are both common in Brazilian Portuguese.

• eu lembro da página = I remember the page
• eu me lembro da página = I remember the page

In everyday use, the difference is usually small. Both are natural.

Very roughly:

• lembrar de is a common conversational pattern
• lembrar-se de is also very standard and often feels a little more complete or careful

So all of these can exist:

• Eu lembro da página
• Eu me lembro da página
• Ainda lembro da página
• Ainda me lembro da página

Yes, it could.

Portuguese often drops subject pronouns when the verb already makes the subject clear.

So both are natural:

• mas eu ainda lembro da página...
• mas ainda lembro da página...

Including eu can add a little emphasis or contrast, as if saying:

• but I still remember...

That works well here because of mas:

• something was lost or fell,
• but I still remember something important.

So eu is not required, but it sounds very natural.

Here, ainda means still.

So:

• eu ainda lembro = I still remember

It shows that the memory remains true up to now.

Depending on context, ainda can also mean things like yet or even, but in this sentence the clear meaning is still.

Examples:

• Ainda estou aqui. = I am still here.
• Você ainda trabalha lá? = Do you still work there?
• Eu ainda lembro disso. = I still remember that.

Caiu is the preterite form of cair (to fall).

• cair = to fall
• ele/ela/você caiu = he/she/you fell

Since o marcador is singular, the verb is in the third person singular:

• O marcador caiu = The marker/bookmark fell

The preterite is used for a completed action in the past. The fall happened once and is finished.

Compare:

• caiu = fell
• caía = was falling / used to fall

Here, caiu is the natural choice.

Estante can mean shelf, bookshelf, or bookcase, depending on context.

In Brazilian Portuguese, estante often refers to a larger shelving unit or bookcase, not just one single shelf.

So da estante could be understood as:

• from the shelf
• from the bookcase
• from the bookshelf

The exact English choice depends on the context you were given.

Yes. Marcador can mean different things depending on context, such as:

• marker pen
• bookmark
• marker in a more general sense

If the sentence is talking about books, pages, and chapters, many learners would wonder whether it means bookmark. In Brazilian Portuguese, marcador can sometimes be understood that way from context, though marcador de páginas is more explicit.

So the exact meaning depends on the context already provided to you.

In Portuguese, adjectives usually come after the noun.

So:

• capítulo final = final chapter
• página final = final page
• livro interessante = interesting book

Putting final before the noun is generally not the normal pattern here.

Also, capítulo final sounds natural and standard in Portuguese. In many contexts, último capítulo is also possible, but it is not always exactly the same in tone:

• capítulo final = final chapter, with a sense of conclusion
• último capítulo = last chapter, focusing more on order

Often they overlap, but capítulo final is perfectly natural.

It means the page from/of the final chapter.

Portuguese often uses de to connect nouns in a way that English can express in several ways:

• the page of the final chapter
• the page from the final chapter
• sometimes even the final chapter’s page, though that is less natural in English

So:

• a página do capítulo final = the page of/from the final chapter

In normal understanding, it means a specific page that is part of that final chapter.

You may see lembrar used directly with an object, but in everyday Brazilian Portuguese, lembrar da página is much more natural.

So for a learner, the best choice is:

• Eu lembro da página.

Instead of:

• Eu lembro a página. — possible in some usage, but not the usual everyday Brazilian pattern here

If you want to sound natural in Brazil, prefer:

• lembrar de
• or lembrar-se de

Examples:

• Lembro da história.
• Me lembro do nome.
• Você lembra da data?