koukou de nihongo o benkyoushimasu.

direct object particle

Breakdown of koukou de nihongo o benkyoushimasu.

• 日に本ほん語ご: Japanese (language)
• 勉べん強きょうする: to study

Questions & Answers about koukou de nihongo o benkyoushimasu.

Where is the subject “I” in 高校で日本語を勉強します。?

In Japanese, the subject “I” (私 / わたし) is often left out when it’s obvious from context.

So the full version could be:

• 私は高校で日本語を勉強します。
  I will study Japanese in high school.

But if it’s already clear that you’re talking about yourself, Japanese normally just drops 私 and says:

• 高校で日本語を勉強します。

Listeners automatically understand “I” from the situation, the conversation topic, or who is speaking. This omission is very natural in Japanese and happens all the time, especially with 私.

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Why does 高校 use the particle で? Why not に?

で marks the place where an action happens.
In 高校で日本語を勉強します。, the action 勉強します (study) happens at/in high school, so we use:

• 高校で = at high school / in high school

Contrast this with に, which often marks:

• A destination (where you go to)
  
  • 高校に行きます。 – I go to high school.
• Or an existence/location (where something/someone is)
  
  • 先生は高校にいます。 – The teacher is at the high school.

So:

• 高校に行きます。 – I go to the high school. (destination)
• 高校で勉強します。 – I study at the high school. (place of action)

For “do something at/in a place,” で is the normal choice.

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