不到grammar point · tier 1 · 不到 + amount — less than, under (the figure falls short of the mark)
· búdào
Set before a quantity to report it falls short of that figure — under, fewer than, less than the mark named.
字源 FORM what the parts do
到 carries 至, an arrow dropped point-down into the ground — the mark reached; 刀 rides along only for the sound. 不 negates that reaching. The amount is launched at a figure and 不到 says it never lands on it: the count stops short of the number.
故事 STORY a scene to remember it by
An arrow flies at a line drawn on the ground and drops in the dirt before it, short of the line.
A count, age, time, or measure comes in below a figure you want to name — it does not reach that number.
序 · The move
1Name the figure the amount is being measured against — the mark on the line.Is this a number with a measure (九十公分, 一個小時, 五歲), not a verb's result?
2Set 不到 directly in front of that figure to say the amount lands below it.Does 不到 read as 'under / fewer than' the number, rather than 'cannot reach' an action?
3Attach the whole 不到-phrase where it belongs — before the noun with 的, or after the subject as the predicate.Could you swap in 超過 and get the opposite (over the figure)? If yes, 不到 is sitting right.
例 · Examples
1身高height (of the body)不到under, less than — the figure stops short of the mark九十公分ninety centimetres (the mark not reached)的兒童children可以免費入場enter free of charge。
Children under ninety centimetres in height get in free.
不到 + figure measures a quantity falling below a number — 不到九十公分, under ninety. V不到 wedges 不 inside a verb to say the action cannot attain its target — 找不到, cannot find. 不到 grades how far short an amount is; V不到 rates whether a verb can land at all.
Both report a figure short of the mark, but the verdict flips. 不到 only states the amount is under (could be far under); 差不多 calls the remaining gap small — nearly there. Below the line vs nearly on it.
The same line, the opposite side. 不到九十公分 lands below ninety; 超過九十公分 overshoots it. 不到 stops short of the figure; 超過 passes it.
✗ 他不到找那家店 → ✓ 他找不到那家店 (a verb that cannot reach its target takes V不到, not a fronted 不到)
✗ 這個孩子身高不到 → ✓ 這個孩子身高不到九十公分 (不到 needs the figure it falls short of; do not leave it dangling)
✗ 我等了不到，他就來了 → ✓ 我等了不到五分鐘，他就來了 (不到 governs a named amount, not a bare verb)
English 'under / less than' floats freely before any number; the learner forgets 不到 is built from 到 (reach) negated, so it wants a figure to fall short of, and confuses it with V不到 (找不到 'cannot find'), where the same 不到 negates a verb's success instead of grading an amount.