一 + Measure Word + 也/都 + 不/沒 creates strong emphatic negation - "not even one."
Complete negation - Absolutely none
Emphatic denial - Strongly denying something
I don''t recognize even a single character.
He didn''t eat even one bite.
也 and 都 are interchangeable here, both adding emphasis.
Measure word is required
- ❌ 我一也不知道
- ✅ 我一點也不知道
Common measure words in this pattern
- 一點 (a little) → 一點也不
- 一個 (one) → 一個也沒有
- 一次 (once) → 一次都沒
I don't know anything at all about this.
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