gakkou no beru ga natta.

の links nouns and often works like of or 's in English.

So:

• 学校のベル = the school's bell / the bell at the school

In Japanese, Noun 1 の Noun 2 is a very common way to show possession, connection, location-related association, or type.

Here, it does not necessarily mean the school literally owns a bell in a strict sense. It just means the bell associated with the school.

が marks the grammatical subject of the verb.

In this sentence:

• ベルが鳴った = the bell rang

The verb 鳴る is an intransitive verb, so the bell is the thing that performs or undergoes the ringing on its own, grammatically speaking. Because of that, ベル is marked with が, not を.

A learner-friendly way to think about it is:

• が marks what rang
• を would mark what someone rang, but that would require a different verb

Because 鳴る does not take a direct object. It is intransitive.

• 鳴る = to ring / to sound
• something rings by itself

So you say:

• ベルが鳴った = the bell rang

If you want to say that someone rang the bell, you use the transitive verb 鳴らす:

• ベルを鳴らした = someone rang the bell

This is a very common Japanese verb pair:

• 鳴る = intransitive
• 鳴らす = transitive

鳴った is the plain past form of 鳴る.

Breakdown:

• dictionary form: 鳴る
• past plain form: 鳴った

It means rang or has rung, depending on context.

This -った ending comes from how some -る verbs conjugate in Japanese. Not all -る verbs behave the same way, so this is something learners usually memorize verb by verb.

It can be understood in more than one way depending on context.

鳴った often corresponds to:

• rang
• has rung

For example:

• if you are narrating events, it may feel like rang
• if you are reacting to a sound you just heard, it may feel like has rung

Japanese past forms often cover both simple past and present perfect meanings that English separates more clearly.

Japanese does not have articles like the and a/an.

So:

• 学校 can mean school, the school, a school
• ベル can mean bell, the bell, a bell

Context tells you which interpretation is natural.

In this sentence, English often uses the because the bell is understood as a specific bell associated with the school.

Japanese sentence structure is different from English.

A simple way to see the structure is:

• 学校のベル = the school's bell
• が = subject marker
• 鳴った = rang

So the sentence is basically:

• [the school bell] [subject marker] [rang]

Japanese verbs usually come at the end of the sentence. Modifiers also come before what they modify, so 学校の comes before ベル.

Yes, but it changes the nuance.

• 学校のベルが鳴った。
  Focuses on the event: the school bell rang

• 学校のベルは鳴った。
  Puts the school bell in topic position, often with contrast or emphasis, like:
  As for the school bell, it rang
  or
  The school bell did ring

In many neutral event-reporting sentences, が sounds more natural because it simply presents what happened.

ベル is a loanword from English bell.

It is written in katakana because it is a borrowed word.

In this sentence, ベル refers to a bell or bell sound system, such as the school bell that signals class times. In modern Japanese, using ベル here is completely natural.

Yes, very often.

Many schools in Japan use an electronic chime rather than a literal bell, so:

• 学校のチャイムが鳴った。

is also very natural.

The difference depends on what kind of sound/device you want to describe:

• ベル = bell
• チャイム = chime

In real-life school contexts, チャイム may even sound more common.

No, they are different.

• 学校のベル = the bell of/at the school
• 学校で means at school and marks the location of an action

So 学校でベルが鳴った would mean something like:

• A bell rang at the school

That is grammatical, but it has a different structure and emphasis.

Compare:

• 学校のベルが鳴った = the school's bell rang
• 学校でベルが鳴った = a bell rang at school

The first one identifies the bell by its relationship to the school. The second one identifies the place where the ringing happened.

Yes, Japanese often omits things that are obvious from context.

For example, if everyone already knows you are talking about the school bell, someone might simply say:

• 鳴った。 = It rang.

But in this sentence, ベル is included because the speaker is explicitly naming what rang. Japanese includes subjects when they are useful, but often leaves them out when they are already understood.

A polite version would be:

• 学校のベルが鳴りました。

Here:

• 鳴った = plain past
• 鳴りました = polite past

Both mean the same basic thing, but 鳴りました is more appropriate in formal situations, when speaking to a teacher, customer, stranger, or in announcements.

Yes, it is a very natural, complete Japanese sentence.

It sounds like a straightforward statement of an event, such as noticing that class is starting or ending.

For example, it could be used in contexts like:

• someone hears the school bell
• someone is narrating what happened
• someone is reminding others that time is up

It is short, natural, and grammatically standard.