Mandarin Chinese requires a measure word (量词) between a number and a noun, and the conventional choice depends on the noun. This checker scans your text for counted phrases and flags pairs where the measure word does not match the conventional classifier.
How it works
The checker walks the text looking for the pattern:
NUMERAL/DEMONSTRATIVE + CLASSIFIER + NOUN
三 / 这 … 本 / 只 … 书 / 狗 …When it finds a measure word that directly follows a numeral (一二三…, 0-9, 几, 两) or a demonstrative (这, 那, 哪, 每), it reads the next one or two characters as a candidate noun. If that noun is in its lookup table, it compares the measure word you used against the conventional one. A difference is flagged unless you used the generic 个, which is always accepted.
Why classifiers are difficult for learners
Unlike English, where you count almost everything with bare numbers (“three books,” “five dogs”), Mandarin demands a classifier between every number and its noun. There is no universal rule that predicts the right word from meaning alone — you have to learn the pairing. That said, classifiers do follow loose patterns based on the shape, type, or cultural category of the noun, and recognising those patterns dramatically reduces the number you need to memorise from scratch.
Common classifier patterns
| Classifier | Category | Example |
|---|---|---|
| 个 (gè) | Generic, people informally | 一个人, 三个苹果 |
| 本 (běn) | Bound objects: books, albums, dictionaries | 三本书, 两本词典 |
| 只 (zhī) | Smaller animals, hands, ears | 一只狗, 两只猫 |
| 匹 (pǐ) | Horses, bolts of cloth | 一匹马 |
| 条 (tiáo) | Long, flexible things: fish, rivers, roads, trousers | 两条鱼, 一条路 |
| 辆 (liàng) | Wheeled vehicles | 一辆车, 三辆公共汽车 |
| 张 (zhāng) | Flat objects: paper, tables, maps, tickets | 一张纸, 两张票 |
| 杯 (bēi) | Cupfuls, glassfuls | 一杯水, 两杯茶 |
| 位 (wèi) | Polite form for people | 一位老师, 两位客人 |
| 件 (jiàn) | Items of clothing, matters, luggage | 一件衬衫, 三件事 |
| 把 (bǎ) | Things with a handle, or handfuls | 一把刀, 两把椅子 |
The generic classifier 个 is informally acceptable for most nouns in spoken Mandarin, which is why the checker accepts it without flagging. In formal writing, exams, or learner materials, the specific classifier is preferred.
Worked examples
三本书— correct. 书 (book) conventionally takes 本.五匹书— flagged. 匹 is for horses and cloth, not books.两条鱼— correct. 鱼 (fish) takes 条, the classifier for long flexible things.一个老师— accepted (generic 个), though 一位老师 is more polite in formal contexts.
The tool only flags nouns in its curated list. Rare words, proper nouns, and compound phrases are skipped rather than guessed, and the checker notes when a noun was not found so you know the result is incomplete.