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How to Say ‘How did you know’ in Traditional Chinese

你怎麼知道

nǐ zěn me zhī dào

[nǐ zěnme jir-dao]

💬 Usage Tip: 怎麼 (zěn me) goes right before the action to ask "how": 你怎麼來的 "how did you get here".

Phrase Breakdown

你

nǐ

[nǐ]

you

Refers to the person being spoken to.

Example

你今天看起來很高興。

You look happy today.

怎麼

zěn me

[zěnme]

how come; why

Asks why, often with surprise.

Example

你怎麼還沒睡?

How come you're not asleep yet?

知道

zhī dào

[jir-dao]

know; understand

Used when you know information or understand a situation.

Example

我知道取消要提前通知。

I know that cancellation requires advance notice.

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