siken no mae ha, tosyokan no zisyuusitu de nando mo nooto wo yomikaesimasu

Each の links one noun to another.

• 試験の前 = before the exam
  • literally, the exam's front/before
• 図書館の自習室 = the library's study room / the self-study room in the library

So here, の is doing the job of connecting nouns, often like of, 's, or a noun used as an adjective in English.

試験の前 means before the exam.

The は makes that whole time phrase the topic:

• 試験の前は、... = As for before exams, ... / Before exams, ...

This gives the sentence a sense like:

• When it's before an exam, I...
• As for the period before an exam, ...

So は is not part of 前 itself; it marks 試験の前 as the topic of the sentence.

No. In this sentence, 前 means before in a time sense, not in front of in a physical sense.

• 試験の前 = before the exam (time)
• something like 学校の前 could mean in front of the school (place)

Japanese uses 前 for both ideas, so the meaning depends on context.

で marks the place where an action happens.

• 図書館の自習室で = in the library's study room
• The action is 読み返します (reread/review), and that action happens there.

Compare:

• で = where an action takes place
• に = destination, existence, specific time, etc.

Here, because someone is doing something in that place, で is the correct particle.

Yes, 何度 by itself can mean how many times in a question.

But when you add も, it becomes an expression meaning:

• many times
• over and over
• repeatedly

So:

• 何度もノートを読み返します = I reread my notes many times

This is a common pattern:

• question word + も can mean a large amount or repeatedly, depending on context.

読み返します means more than just read. It means:

• read again
• reread
• go over again
• review by rereading

It is made from:

• 読む = to read
• 返す = to return/back

In compound form, 〜返す often gives the idea of doing something again or back over.

So:

• ノートを読みます = I read my notes
• ノートを読み返します = I reread/review my notes

The second one fits studying much better.

It can mean either, depending on context. In study-related sentences, ノート often means:

• notes
• a notebook
• class notes

Here, because the person is studying before an exam, ノートを読み返します most naturally means:

• I reread my notes
• or I go back over my notebook

English often prefers notes in this kind of sentence, even though Japanese uses the singular-looking ノート.

Japanese nouns usually do not show singular/plural clearly the way English does.

So ノート could mean:

• a notebook
• notes
• notebooks

Context decides the best translation. In this sentence, English would usually say notes.

Japanese often leaves out the subject when it is understood from context.

So this sentence does not explicitly say:

• I
• he/she
• we

But in many learning examples, the natural assumption is I, especially with a sentence describing a habitual personal action:

• Before exams, I reread my notes many times in the library study room.

In real Japanese, this omission is very normal.

読み返します is the polite non-past form of the verb.

It can express:

• a habitual action
• a future action
• a general practice

Here it sounds like a habit:

• Before exams, I usually reread my notes many times...

The ます form is commonly used in textbook sentences and polite conversation.

Its dictionary form is:

• 読み返す

It breaks down like this:

• 試験の前は = before exams / as for before an exam
• 図書館の自習室で = in the library study room
• 何度も = many times
• ノートを = notes (object)
• 読み返します = reread / review

So the sentence follows a very typical Japanese pattern:

[time/topic] + [place] + [frequency] + [object] + [verb]

That is why the verb comes at the end.

自習室 means self-study room or study room.

It is made of:

• 自習 = self-study
• 室 = room

So 図書館の自習室 is the study room in a library, often a quiet place for students to work alone.

Yes. Because of は, it can carry a mild contrast like:

• Before exams, I do this
  (implying that at other times, I may do something different)

This contrast may be very weak, and sometimes English does not translate it directly. But は often gives that background feeling of as for X...

So the sentence can subtly suggest:

• When it's before an exam, I make a point of reviewing my notes many times.