一~も~ない (not a single)
grammar9 sentences
The frame 一+[counter]+も + [negative predicate] — 'not even one X,' a strong universal negation. The additive も is what lifts 一 from a neutral count to emphatic '(not) even one.' Productive across counters: 一つも~ない ('not even one'), 一人も~ない / 一人もいない ('not a single person'), 一度も~ない ('not even once / never'). The 一 here is the lower bound used to emphasize absolute negation, not 'one' in the literal-count sense.
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