在英语写作或口语中，频繁使用 “I have no idea” 会显得单调。以下是一些常见且地道的同义表达，适用于不同语境：
正式/书面表达
- I am unaware of...
- I do not know...
- It is unclear to me...
- I cannot say for certain...
- The answer eludes me.
日常/口语表达
- I’ve got no clue.
- Beats me!
- Your guess is as good as mine.
- I’m in the dark about that.
- No idea whatsoever!
幽默/非正式表达
- Search me!
- Don’t ask me!
- Not a scooby!（英式俚语）
- I wouldn’t know if my life depended on it!
根据场合选择合适的表达，能让你的英语更自然、更地道！