rouka de hasiru to, sensei ni tyuuisaremasu.

で marks the place where an action happens.

So:

• 廊下 = hallway / corridor
• 廊下で = in the hallway / at the hallway as the location of the action

Since 走る is an action, Japanese uses で to show where that action takes place.

So 廊下で走る means to run in the hallway.

Because で and に do different jobs.

• で = where an action happens
• に = destination, existence, or point in time, depending on the sentence

Here, the sentence is talking about the location of the action running, not the destination of the running. So で is correct.

• 廊下で走る = run in the hallway
• 廊下に走る would sound unnatural here, because it would suggest something like running to the hallway, not running in it

Here, と is a conditional, meaning something like:

• if
• when
• whenever

So:

• 廊下で走ると、先生に注意されます。 = If/When you run in the hallway, you get scolded by the teacher.

This と often expresses a result that naturally happens, regularly happens, or is expected to happen.

In this sentence, it has the feeling of:

• Whenever someone runs in the hallway, the teacher warns them
• If you run in the hallway, you’ll get told off by the teacher

Not exactly.

Japanese has several ways to say if, and they are not always interchangeable.

と

Used for results that are automatic, habitual, general, or expected.

• 廊下で走ると、先生に注意されます。 = If you run in the hallway, you get scolded.

This sounds like a general rule or common consequence.

たら

Often used for specific situations, future events, or personal intention.

• 廊下で走ったら、先生に注意されます。

This is also possible, but it sounds a bit more like if that happens in a particular case.

なら

Often means if it is the case that... or if you say...

So と is a very natural choice here because the sentence sounds like a school rule or a predictable consequence.

In passive sentences, に often marks the person who performs the action.

So in:

• 先生に注意されます

the teacher is the one doing the scolding/warning, even though the sentence is passive.

So here に means something like:

• by the teacher

Compare:

• 先生が注意します。 = The teacher scolds/warns.
• 先生に注意されます。 = (Someone) is scolded/warned by the teacher.

So yes, に can mean to, but in passive sentences it often means by.

Because the sentence focuses on the person receiving the warning, not the teacher giving it.

Active:

• 先生が注意します。 = The teacher warns/scolds.

Passive:

• 先生に注意されます。 = You are warned/scolded by the teacher.

In Japanese, the passive is often used when the speaker wants to emphasize:

• the experience of being affected
• the consequence to the person receiving the action
• a slightly negative or unpleasant feeling

So here, the passive fits very naturally because the point is:

• If you run in the hallway, you end up getting told off by the teacher.

注意する literally means something like:

• to warn
• to caution
• to point out
• to scold / tell someone off

In everyday Japanese, when a teacher, parent, or boss 注意する, it often means they are correcting someone’s behavior.

So in this sentence, natural English translations include:

• be warned by the teacher
• be scolded by the teacher
• get told off by the teacher

The exact nuance depends on context, but in a school rule sentence, get scolded or get told off often sounds the most natural.

The subject is omitted, which is very common in Japanese.

The sentence does not explicitly say you, but that is understood from context. In English, we usually need to supply it:

• If you run in the hallway, you’ll be scolded by the teacher.

It could also mean:

• If one runs in the hallway, one gets scolded by the teacher
• If students run in the hallway, they get scolded by the teacher

Japanese often leaves out subjects when they are obvious from context.

Because before と as a conditional, Japanese normally uses the plain form.

So:

• 走ると = if/when someone runs

Using 走りますと is grammatically possible in very formal or stiff speech, but it is not natural here.

This pattern is normal:

• dictionary/plain form + と

Examples:

• 春になると、暖かくなります。 = When spring comes, it gets warm.
• そのボタンを押すと、ドアが開きます。 = If you press that button, the door opens.

So 走ると is exactly what you would expect.

The sentence ends politely because 注意されます is in the polite form.

Japanese often mixes:

• a plain form in the conditional part: 走ると
• a polite form at the end of the sentence: 注意されます

That is completely normal.

So the sentence is polite overall, even though 走る is plain. The politeness of the sentence is mainly shown at the end.

Yes. In fact, that is probably the most natural reading.

Because of と, this sentence often sounds like:

• a rule
• a general truth
• a habitual consequence

So it feels like:

• If you run in the hallway, the teacher will scold you
• Running in the hallway results in being scolded by the teacher
• Whenever someone runs in the hallway, the teacher warns them

It does not strongly sound like one specific future event unless the context makes it specific.

Sometimes 廊下を走る can appear, but it has a slightly different feel.

廊下で走る

Focuses on the location where the action happens:

• run in the hallway

廊下を走る

Can emphasize moving through/along the hallway:

• run through the hallway
• run down the hallway

For a school-rule type sentence, 廊下で走る is the most straightforward and natural choice because the point is the place where running is not allowed.

Grammatically, 先生 can be singular or understood generically depending on context, but here it is most naturally read as the teacher.

In English, we usually translate it as singular:

• the teacher

But depending on the situation, the broader sense could be:

• a teacher
• teachers

Japanese often does not mark singular vs. plural unless it really matters.

A natural reading is:

• ろうか で はしる と、せんせい に ちゅうい されます。

Romanization:

• Rōka de hashiru to, sensei ni chūi saremasu.

Word-by-word:

• 廊下 = ろうか = rōka
• 走る = はしる = hashiru
• 先生 = せんせい = sensei
• 注意 = ちゅうい = chūi

It sounds like a typical school warning or rule.

The overall nuance is something like:

• Don’t run in the hallway, or the teacher will tell you off.
• If you run in the hallway, you’ll get scolded by the teacher.

Because of the passive 注意されます, it slightly emphasizes the unpleasant consequence for the person running. So the tone is not just neutral description; it also carries the feeling of you’ll get in trouble.