中学生

中学生

Middle school student.

Here, '中学生' is used as a noun to describe the occupation or role of the subject in the sentence.

妹は中学生です。

My younger sister is a middle school student.

In this sentence, '中学生' is used as a plural noun modified by '近所の', indicating a specific group of people.

近所の中学生たちはとても礼儀正しいです。

The middle school students in the neighborhood are very polite.

Here, '中学生' is part of a compound noun '中学生大会', describing an event specifically for middle school students.

学校の中学生大会は来週開かれる予定です。

The school's middle school student tournament is scheduled to be held next week.