第-, 老-, and 小- in Ordinals, Address, and Lexical Words in Chinese
第- / 老- / 小-
第- forms ordinal numbers, while 老- and 小- can attach to surnames, kinship-like ranks, or established words. In address, 老 and 小 may signal familiarity, seniority, or relative age rather than literal oldness or small size. These are bound word-forming uses, so social context and lexical convention restrict each combination.
Published July 26, 2026
Reviewed July 26, 2026
01 / PATTERN
See the Structure
MODEL
第 + numeral; 老/小 + surname, rank, or lexical base
Read the structure
第- forms ordinal numbers, while 老- and 小- can attach to surnames, kinship-like ranks, or established words. In address, 老 and 小 may signal familiarity, seniority, or relative age rather than literal oldness or small size. These are bound word-forming uses, so social context and lexical convention restrict each combination. Keep the model 第 + numeral; 老/小 + surname, rank, or lexical base visible while you compare each sentence.
她住在第二层。
She lives on the second floor.
Choose the right context
Form ordinals with 第 directly before a numeral. Use established 老 + surname or rank forms when the relationship and register license them. Use established 小- words or familiar address forms where relative youth, affection, or lexical convention is clear.
老王今天不在办公室。
Old Wang is not in the office today.
Respect the boundary
Do not use 两 after 第; ordinals use 第 + 二. Do not add 老 or 小 to an unfamiliar person's surname without considering politeness and local convention. Do not interpret every 老- or 小- compound literally as old or physically small.
她住在第两层。
(She lives on the second floor.)
Repair the pattern
两 follows the ordinal prefix: Ordinals use 第 + numeral, and the numeral two is 二 rather than 两 in this pattern. A classifier splits 第 from its numeral: 第 attaches directly to the ordinal quantity 三次. An extra 个 cannot split or duplicate that quantity phrase.
她住在第二层。
Use the repaired structure without changing the intended meaning.
02 / MAP
Read the Sentence
Read from left to right and notice the job performed by each part. The labels describe this example; they are not a rule that every Chinese sentence must copy.
她住在第二层。
She lives on the second floor.
她
第
This part occupies the 第 position in the model pattern.
住在
numeral; 老/小
This part occupies the numeral; 老/小 position in the model pattern.
第二
surname, rank, or lexical base
This part occupies the surname, rank, or lexical base position in the model pattern.
层
第
This part occupies the 第 position in the model pattern.
03 / EXAMPLES
Examples You Can Reuse
Keep the structure stable while changing the people, objects, times, or conditions. Pinyin is shown as reading support; use the Chinese sentence and translation to confirm the grammar relationship.
她住在第二层。
She lives on the second floor.
老王今天不在办公室。
Old Wang is not in the office today.
小李刚加入我们组。
Young Li just joined our group.
04 / LIMITS
When to Use It — and When Not To
Use it when
- Form ordinals with 第 directly before a numeral.
- Use established 老 + surname or rank forms when the relationship and register license them.
- Use established 小- words or familiar address forms where relative youth, affection, or lexical convention is clear.
Do not use it when
- Do not use 两 after 第; ordinals use 第 + 二.
- Do not add 老 or 小 to an unfamiliar person's surname without considering politeness and local convention.
- Do not interpret every 老- or 小- compound literally as old or physically small.
05 / REPAIR
Compare Right and Wrong
Compare the smallest meaningful change. Each explanation identifies a placement, scope, form, or clause relationship instead of treating the whole sentence as one undifferentiated mistake.
她住在第两层。
她住在第二层。
两 follows the ordinal prefix
Ordinals use 第 + numeral, and the numeral two is 二 rather than 两 in this pattern.
这是第三个次会议。
这是第三次会议。
A classifier splits 第 from its numeral
第 attaches directly to the ordinal quantity 三次. An extra 个 cannot split or duplicate that quantity phrase.
她住在第两层。
Use 第二, not 第两.
这是第三个次会议。
Use the intact ordinal quantity 第三次.
06 / PRACTICE
Practice the Grammar Point
Complete three short tasks in order: judge the pattern, repair a common error, and build the sentence. Feedback is fixed and reviewed, so these activities do not use a checker allowance.
1. Judge the sentence
2. Choose the correction
3. Build the sentence
Build a complete sentence with 第- / 老- / 小-.
07 / APPLY
Apply It in Your Sentence
Write one original sentence with 第- / 老- / 小-. Your draft moves to the checker through this browser session, selects this grammar point as the first review focus, and waits for you to submit.
08 / QUESTIONS
第-, 老-, and 小- in Ordinals, Address, and Lexical Words Questions
Does 老王 always mean Wang is old?
No. 老 before a surname can be a familiar social form shaped by relationship, seniority, and local usage. It should not be applied mechanically.
Is 小- always a prefix?
No. 小 can be an independent adjective meaning small or young. This lesson covers bound or semi-bound uses in established words and address forms.
09 / SOURCES
Sources and Review Notes
These references support different parts of the lesson. GF0025-2021 supports level placement only; professional grammar works support the explanation, limits, examples, and cross-checks. Their inclusion does not imply endorsement.
Chinese Proficiency Grading Standards for International Chinese Language Education (GF0025-2021)
Ministry of Education and State Language Commission · Ministry of Education of the PRC · 2021
Locator: Appendix A, Level 3 item 【三01】, 前缀：第-、老-、小-, PDF p. 197 (selection candidate range pp. 197–198; the item itself begins on p. 197)
Lists 第-, 老-, and 小- as the official Level 3 prefix inventory and supplies representative forms.
Official sourceChinese Affixes and Word Formation
Fu Ruomei · Humaniora · 2014
Locator: Article pp. 1–2, prefix discussion of 第, 老, and 小; full PDF body opened
Describes 第- as ordinal-forming and explains semantically bleached 老- and 小- in address, rank, and established lexical formations.
Official source10 / CONTINUE
Continue with a Connected Rule
Easy to confuse
二 / 两二 (èr) vs 两 (liǎng)
Ordinal 第 requires 二 rather than 两, connecting prefix formation directly to the two-form number distinction.
Compare
定语语序Basic Attributive Order
Bound 老- and 小- address forms are lexical units, unlike ordinary adjectives modifying a noun phrase.
Continue learning
我/你/他/她/我们Basic Personal Pronouns
Compare personal reference through pronouns with socially marked surname address using 老- or 小-.
Compare
这 / 那这 / 那 Demonstratives
第- creates an ordinal while demonstratives select a referent before its classifier and noun.
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Easy to confuse
Ordinal 第 requires 二 rather than 两, connecting prefix formation directly to the two-form number distinction.