HSK 5 Nominal Classifiers: 册, 朵, 届, 颗, 匹, 行, 架, 群, 支, 根, 批, 束, 副, 集, and 周

Overview and Core Sentence Structures

For ordinary counted nouns, Mandarin commonly places a classifier between a number and a noun, as in 一支笔. Demonstratives also often use a classifier, as in 那架飞机. This lesson covers the fifteen nominal measure words listed together in the supplied HSK 5 outline; self-contained units such as 周 have their own pattern.

When using demonstratives like 这 (this), 那 (that), or 哪 (which), the numeral 一 (one) is frequently omitted in spoken and written Chinese, leaving the demonstrative directly before the classifier. In addition, the classifier 周 (week) functions as a self-contained time measure word that normally follows a numeral directly without needing a following noun.

Classifiers for Shapes, Animals, and Machines

Six of the target classifiers categorize individual physical items based on their visual shape, biological category, or mechanical support structure.

• 朵 (duǒ): Used for flowers, clouds, and objects that bloom or cluster like petals (for example, 花 flowers, 云 clouds).
• 颗 (kē): Used for small, round, bead-like, or pearl-like objects, including grains, teeth, stars, and hearts (for example, 石子 pebbles, 星星 stars, 牙齿 teeth).
• 支 (zhī): Used for rigid, rod-like instruments, especially writing tools, candles, rifles, and songs or teams in certain contexts (for example, 钢笔 fountain pens, 铅笔 pencils, 蜡烛 candles).
• 根 (gēn): Used for long, thin, often flexible or fibrous objects, or objects growing from a base (for example, 绳子 ropes, 头发 hairs, 香蕉 bananas, 木头 logs).
• 架 (jià): Used for aircraft, large machinery, or instruments supported by a frame or tripod (for example, 飞机 airplanes, 直升机 helicopters, 钢琴 pianos, 照相机 cameras).
• 匹 (pǐ): Used primarily for horses, mules, and bolts of cloth (for example, 马 horses, 布 cloth).

Classifiers for Groups, Pairs, and Linear Arrangements

Rather than counting single items, five classifiers in this group organize nouns into collections, batches, tied bundles, matched sets, or lines.

• 群 (qún): Denotes a crowd of people or a flock, herd, or pack of living creatures moving or gathering together (for example, 人 people, 羊 sheep, 孩子 children).
• 批 (pī): Denotes a batch of goods or a group of people processed, arriving, or dispatched together in an organized wave (for example, 货物 goods, 志愿者 volunteers, 游客 tourists).
• 束 (shù): Denotes a tied bundle or bouquet, as well as a focused beam of light (for example, 鲜花 fresh flowers, 阳光 sunlight).
• 副 (fù): Denotes matched pairs or complete sets that function as a unit, as well as facial expressions (for example, 手套 gloves, 眼镜 glasses, 耳环 earrings, 笑脸 smiling face).
• 行 (háng): Read with the second tone (háng) as a classifier, it denotes a horizontal row or vertical column of words, trees, or footprints, including lines of tears (for example, 字 characters, 树 trees, 眼泪 tears).

Classifiers for Publications, Scheduled Events, and Time

The remaining four classifiers measure bound volumes, serialized media episodes, periodic institutional events, and weeks.

• 册 (cè): Used for bound volumes or individual books within a multi-volume collection (for example, 书 books, 画册 picture albums). It is more formal than 本 and emphasizes volume divisions.
• 集 (jí): Used for episodes of a television series or documentary, or parts of an anthology (for example, 电视剧 TV drama, 纪录片 documentary).
• 届 (jiè): Used for regularly scheduled meetings, conferences, graduating classes, or sporting events that occur in numbered editions (for example, 运动会 sports games, 会议 conferences, 毕业生 graduates).
• 周 counts weeks directly: 两周. It can be followed by 的 and a noun when forming a modifier, as in 两周的假期. No extra 个 is needed in the basic measure phrase.

Key Contrasts and Common Learner Mistakes

Learn 一支钢笔 as the standard general model, but do not reduce 支 and 根 to a rigid-versus-flexible rule: 一根钢管 is rigid, and 一根铅笔 is also used. 根 emphasizes a long thin shape; 支 is a conventional choice for many writing tools. 一根钢笔 occurs in actual usage too, so it is not universally ungrammatical merely because a pen is rigid.

• 朵 vs. 束 for flowers: 一朵花 refers to a single blossom, whereas 一束花 refers to a gathered bouquet of multiple stems.
• 群 vs. 批 for people: 一群人 focuses on a physical crowd gathered in one place, while 一批人 focuses on a cohort or batch (such as a batch of new interns or customers arriving in stages).
• 副 and 双 can overlap: 一副手套 and 一双手套 are both possible. Learn conventional pairs such as 一副眼镜 and 一双筷子. Whether parts are connected is a helpful association in some examples, not a complete rule for choosing every pair classifier.

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