1. He went to the teachers' room. There were many teachers, and he was able to see some students scolded by a teacher.

2. The native speaker has his office. In the teacher's office, we talked with the foreign speaker.

3. The teacher's room is a little small, so only 15 students can sit on their chairs.

4. The head teacher has his room. In the teacher's office, students learn Chinese characters.

(What expressions do we have to use? Teachers' room, teacher's room. teacher's office, teachers' office.)

looking good

Sra

In the given sentences, different expressions are used to refer to the rooms and offices in a school. To understand when to use "teachers' room," "teacher's room," "teacher's office," or "teachers' office," let's break down the meanings of these phrases:

1. "Teachers' room" refers to a room that is used or primarily occupied by multiple teachers. In this sentence, it is used correctly because it describes a room where there are many teachers.

2. "Teacher's office" refers to the office that belongs to a specific teacher. In this sentence, it should be changed to "the native speaker's office" to indicate possession.

3. "Teacher's room" refers to a room that belongs to a specific teacher. In this sentence, it should be changed to "the teacher's room" since it is discussing a particular room's size.

4. "Teachers' office" refers to an office that is used or primarily occupied by multiple teachers. In this sentence, it should be changed to "the head teacher's office" to indicate possession.

To summarize, "teachers' room" is used correctly in sentence 1, "native speaker's office" should replace "teacher's office" in sentence 2, "the teacher's room" should replace "teacher's room" in sentence 3, and "the head teacher's office" should replace "teachers' office" in sentence 4.