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难道 (rhetorical: don't tell me …?)
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You can't be serious
- Your friend asks whether today's class is cancelled. The whole school knows it isn't.
- surely难道you你not不know知道(yes/no ?)吗? — "Don't tell me you don't know?"
surely难道 … ((yes/no ?)吗)? = rhetorical question
- surely难道 … (yes/no ?)吗? asks a question that expects the opposite answer: "Surely not … ?"
- A negative question expects "yes": surely难道you你not不tired累(yes/no ?)吗? = "Surely you're tired."
surely难道you你not不tired累吗?

Challenge: “Don't tell me you've never heard of him?” ____你没听说过他吗?
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难道…吗 makes a rhetorical question.
What does 难道你不饿吗? suggest?
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A negative 难道 question implies the positive.
Surprise or reproach
- surely难道he他forget忘(completed / change)了? — "Can he really have forgotten?"
- so much这么important重要(modifier / structural particle)的matter事,surely难道you你not不should应该先问I / me我(yes/no ?)吗? — "Shouldn't you have asked me first about something so important?"
can it be难道he他forget忘了?
Build: “Can he really have forgotten?”
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难道 + statement + ?
The answer is built in
- surely难道 does not ask for information; the speaker already believes the answer. Use it to challenge, not to ask.
- surely难道 sits at the start or after the subject: you你surely难道not不know知道(yes/no ?)吗? is also correct.
难道 is used to ask for information you don't have.
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It challenges; the speaker already believes the answer.
Versus a normal question
- you你know知道(yes/no ?)吗? — a real question: "Do you know?"
- surely难道you你not不know知道(yes/no ?)吗? — "You must know!" (and the speaker is surprised or annoyed).
you你know知道吗?
Recap
- surely难道 … (yes/no ?)吗? = surely not … ? / don't tell me …, a rhetorical challenge.
- A negative surely难道 question means the positive: surely难道you你not不tired累(yes/no ?)吗 = you must be tired.
Read the full reference: HSK 4 grammar — Adverbs.
Your friend asks whether today's class is cancelled. The whole school knows it isn't. Close the examples. Say a Mandarin response, then write it in Chinese. Explain briefly in English what the lesson’s pattern adds. Compare with the model, then change one detail and try again.
This is supported productive practice. Compare meaning and structure; your answer need not copy the model. A partner or teacher must hear the spoken response to comment on pronunciation.