明知故问

ask a question you already know the answer to

verb Rare #32,617

ask a question you already know the answer to Often implies that the question is deliberate or unnecessary.

CH: 你明知故问，答案就在桌上。

EN: You’re asking even though you already know the answer; it’s right there on the table.

You already know the answer—why ask?

— 无爱可诉 (2017)

Asking a question you already know the answer to.

— 关于我母亲的一切 (1999)

Stop asking questions when you already know the answer.

— 英国病人 (1996)

You already know the answer—why are you asking?

— 白丝带 (2009)