六種表達『我不知道』的用法

還在用 I don't know 表達「我不知道」嗎？以下六種道地說法，讓你依情境替換使用。

重點整理｜這六種說法的重點

1. I have no idea 最常用
2. I couldn't say 語氣比較正式
3. You're asking the wrong person 委婉幽默

1. I have no idea.（不是「我沒點子」，而是「不知道」）

2. I couldn't say.（不是「我沒辦法說」，而是「不知道答案」）例句：Do you know when he will come? – I couldn't say.

3. I've never given it much thought.（字面是「沒深入想過」，實際上就是「不知道」）例句：What do you think about Vietnam for our next vacation? – I've never given it much thought.

4. I really don't know what to say.（較婉轉的說法，常用於被問喜不喜歡什麼時，其實是委婉表示不喜歡）例句：Do you like the painting? – I really don't know what to say.

5. I really can't say.（跟 I couldn't say 意思相同，表達「不知道」）

6. You're asking the wrong person.（字面是「你問錯人了」，委婉表達自己沒有答案）例句：Do you know how I can get this machine to work? – You're asking the wrong person.

資料來源：IELTS 官網（ielts.org）、British Council、IDP IELTS，2026 年 10 月查證。考試規定可能調整，報名前請以官方最新公告為準。