Formal Identification and Result with 乃 in Chinese
乃
乃 is a literary formal linker used before an identifying, explanatory, or consequent predicate, roughly is precisely, namely, or only then depending on context. The GF item establishes the exact lexical pattern. In modern formal use, 乃 precedes its predicate and cannot be split, suffixed with aspect, or stranded after an object.
Published July 23, 2026
Reviewed July 23, 2026
01 / PATTERN
See the Structure
MODEL
Topic + 乃 + Identification/Result Predicate
Read the structure
乃 is a literary formal linker used before an identifying, explanatory, or consequent predicate, roughly is precisely, namely, or only then depending on context. The GF item establishes the exact lexical pattern. In modern formal use, 乃 precedes its predicate and cannot be split, suffixed with aspect, or stranded after an object. Keep the model Topic + 乃 + Identification/Result Predicate visible while you compare each sentence.
教育乃立国之本。
Education is the foundation of a nation.
Choose the right context
Use 乃 before a formal identifying predicate. Use it to introduce a written explanatory conclusion. Use it in established literary or highly formal wording.
此乃当务之急。
This is the most urgent task.
Respect the boundary
Do not attach aspect 了 to 乃. Do not place 乃 after its predicate object. Do not insert a subject complement before the predicate marker has completed its link.
教育乃了立国之本。
(Education is the foundation of a nation.)
Repair the pattern
Aspect marker follows the formal linker: Identifying 乃 cannot take perfective 了 before its nominal predicate. Formal linker trails its nominal predicate: 乃 must link the topic to the following nominal predicate; it cannot stand after that predicate.
教育乃立国之本。
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.
教育乃立国之本。
Education is the foundation of a nation.
教育
Topic
This part occupies the Topic position in the model pattern.
乃
乃
This part occupies the 乃 position in the model pattern.
立国
Identification/Result Predicate
This part occupies the Identification/Result Predicate position in the model pattern.
之
Topic
This part occupies the Topic position in the model pattern.
本
乃
This part occupies the 乃 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.
教育乃立国之本。
Education is the foundation of a nation.
此乃当务之急。
This is the most urgent task.
上述结论乃多方论证所得。
The conclusion above was reached through multiple lines of argument.
04 / LIMITS
When to Use It — and When Not To
Use it when
- Use 乃 before a formal identifying predicate.
- Use it to introduce a written explanatory conclusion.
- Use it in established literary or highly formal wording.
Do not use it when
- Do not attach aspect 了 to 乃.
- Do not place 乃 after its predicate object.
- Do not insert a subject complement before the predicate marker has completed its link.
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.
教育乃了立国之本。
教育乃立国之本。
Aspect marker follows the formal linker
Identifying 乃 cannot take perfective 了 before its nominal predicate.
此当务之急乃。
此乃当务之急。
Formal linker trails its nominal predicate
乃 must link the topic to the following nominal predicate; it cannot stand after that predicate.
教育乃了立国之本。
Identifying 乃 cannot take perfective 了 before its nominal predicate.
此当务之急乃。
乃 must link the topic to the following nominal predicate; it cannot stand after that predicate.
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 乃.
07 / APPLY
Apply It in Your Sentence
Write one original sentence with 乃. 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
Formal Identification and Result with 乃 Questions
Is 乃 ordinary conversational Mandarin?
No. It is literary or highly formal and is best learned through established written frames.
Does 乃 have only one English translation?
No. Its translation depends on whether it identifies, explains, or marks a consequence.
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: GF0025-2021 Appendix A, official combined Levels 7-9 item 【七—九038】 (PDF p. 246)
Provides official combined Levels 7-9 directory placement and examples only; it does not establish the learner-facing usage explanation.
Official sourceModern Mandarin Chinese Grammar: A Practical Guide, 3rd ed.
Ross, Ma, Chen, He and Yeh · Routledge · 2024
Locator: Chapter 29, §29.1, identification with 是/就是; Chapter 57, focus and identifying constructions
Supports the general placement of an identifying or linking element before its predicate; GF supplies 乃 and its exact lexical examples.
Official source10 / CONTINUE
Continue with a Connected Rule
Easy to confuse
即Formal Immediate Sequence with 即
Compare formal 乃 with 即 in identification and linkage, noting that 即 also marks immediate sequence.
Compare
可不是Emphatic Agreement 可不是
乃 makes a formal written identification, whereas 可不是 gives emphatic agreement in conversation.
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是字句是 Sentences: Identification
Compare literary or formal 乃 with ordinary 是 when identifying one entity or proposition.
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