Antaŭ la ekzameno mi volas esti preta, do mi legas denove ĉiun noton kaj ĉiun paĝon.

Esperanto word order is fairly flexible. Starting with Antaŭ la ekzameno puts the time expression first for emphasis: Before the exam, ...

You could also say:

Mi volas esti preta antaŭ la ekzameno, do mi legas denove ĉiun noton kaj ĉiun paĝon.

That means essentially the same thing. The original just highlights the time frame right away.

Because antaŭ is a preposition, and prepositions normally take the basic noun form, not the accusative.

So:

• antaŭ la ekzameno = before the exam

The -n ending is mainly used for direct objects and sometimes for direction, but not here. This phrase expresses time, not movement toward something.

La means the, so la ekzameno refers to a specific exam, probably one already understood from context.

• antaŭ ekzameno would sound more like before an exam / before exam time in a more general sense
• antaŭ la ekzameno means before the exam

In this sentence, a specific exam is clearly meant.

Because the sentence focuses on the state of being ready, not just the action of preparing.

• esti preta = to be ready
• prepari = to prepare something
• prepariĝi = to get ready / prepare oneself

So:

• Mi volas esti preta = I want to be ready
• Mi volas prepariĝi = I want to prepare myself / get ready

Both are possible in Esperanto, but esti preta matches the idea of the result: being ready.

Because preta is a predicate adjective after esti.

In mi volas esti preta, preta describes mi. It is not a direct object, so it does not take -n.

Compare:

• Mi estas preta. = I am ready.
• Mi volas esti preta. = I want to be ready.

The accusative -n would not be used here.

Do means so, therefore, or thus.

It connects the two ideas logically:

• I want to be ready
• therefore / so I read everything again

It is a very common Esperanto linking word for showing result or consequence.

Because the reading is happening now.

The sentence means:

• the exam is coming later
• right now, I am reading again so that I will be ready

So mi legas = I am reading / I read

If you said mi legos, that would mean I will read, which shifts the action into the future. The original sentence describes a present action done for a future goal.

Denove means again or anew.

So:

• mi legas denove = I read again / I am reading again

Its position is natural because it modifies the verb legas. Esperanto adverbs are often placed near the word they modify, but word order can vary a bit:

• mi denove legas
• mi legas denove

Both are fine. The original sounds very natural.

Because ĉiu means each or every, and both nouns are direct objects of legas, so they take -n.

• ĉiu noto = each note
• ĉiun noton = each note, as a direct object
• ĉiu paĝo = each page
• ĉiun paĝon = each page, as a direct object

The -n on ĉiun and on the noun shows the accusative.

Because ĉiu normally expresses the idea of each/every one individually, so singular is very natural.

• ĉiun noton = each note
• ĉiun paĝon = each page

You could also use plural forms in some contexts:

• ĉiujn notojn = all the notes
• ĉiujn paĝojn = all the pages

The difference is small but useful:

• ĉiun noton emphasizes one by one, individually
• ĉiujn notojn emphasizes the whole set

In this sentence, ĉiun noton kaj ĉiun paĝon gives a careful, thorough feeling: every single note and every single page.

Because Esperanto usually repeats the determiner when it applies separately to two coordinated nouns.

So:

ĉiun noton kaj ĉiun paĝon

clearly means:

• each note
• and each page

If you said only ĉiun noton kaj paĝon, it would sound incomplete or at least less clear. Repeating ĉiun is the normal way to express the idea neatly.

• noto = a note, such as a study note or written remark
• paĝo = a page

So the speaker is being very thorough: reading again both every note and every page.

For a learner, noto here most naturally suggests study notes, class notes, or written notes related to the exam.

In theory, antaŭ can mean both before and in front of, depending on context.

But in this sentence, la ekzameno is an event, not a physical object, so antaŭ la ekzameno is understood as before the exam in time.

If the noun were a physical object, then antaŭ could be spatial:

• Mi staras antaŭ la pordo. = I am standing in front of the door.

Here, the meaning is clearly temporal.

Yes, it is natural and clear.

It has a very standard structure:

• time phrase: Antaŭ la ekzameno
• main statement of intention: mi volas esti preta
• result link: do
• present action supporting that goal: mi legas denove ĉiun noton kaj ĉiun paĝon

A native or fluent speaker would understand it immediately.