先生ですか

are you a teacher?

→ 先生
phrase Uncommon #17,611
are you a teacher? A polite question meaning “is [someone] a teacher?” depending on the subject. 先生 can also refer to other professionals, such as doctors, but here it means teacher.
JA: 田中さんは日本語の先生ですか。
EN: Is Ms. Tanaka a Japanese teacher?

彼があなたの先生ですか

Is he your teacher?

あなたのお父さんは先生ですか

Is your father a teacher?

彼女の父は先生ですか

Is her father a teacher?

彼女があなたの先生ですか

Is she your teacher?

あれは先生ですか

Is that a teacher?

あなたはここの先生ですかそれとも学生ですか

Are you a teacher here, or are you a student?

ブラウンさんは先生ですか

Is Mr. Brown a teacher?

彼は先生ですか

Is he a teacher?