Exact Coincidence with 刚好 and 恰好 in Chinese
刚好/恰好
刚好 and 恰好 mark an exact fit or coincidence in time, quantity, circumstance, or contrast. Both normally precede the predicate they evaluate. 刚好 is common in speech; 恰好 is somewhat more formal. Neither adverb takes aspect itself or belongs inside a number-classifier phrase or verb-object expression.
Published July 23, 2026
Reviewed July 23, 2026
01 / PATTERN
See the Structure
MODEL
Subject + 刚好/恰好 + Predicate
Read the structure
刚好 and 恰好 mark an exact fit or coincidence in time, quantity, circumstance, or contrast. Both normally precede the predicate they evaluate. 刚好 is common in speech; 恰好 is somewhat more formal. Neither adverb takes aspect itself or belongs inside a number-classifier phrase or verb-object expression. Keep the model Subject + 刚好/恰好 + Predicate visible while you compare each sentence.
我要出门时，他刚好回来了。
Just as I was leaving, he happened to return.
Choose the right context
Use 刚好 for a timely coincidence or exact fit. Use 恰好 for a matching circumstance in more formal wording. Place either adverb before the predicate in its scope.
这双鞋的大小恰好合适。
These shoes happen to be exactly the right size.
Respect the boundary
Do not attach perfective 了 to either adverb. Do not insert either adverb between a numeral and classifier. Do not place the adverb between a verb and its object.
他刚了好回来。
(He happened to return.)
Repair the pattern
Aspect marker splits the coincidence adverb: 刚好 is an indivisible adverb; perfective 了 cannot occur between its two syllables. Adverb splits numeral and classifier: 三百元 is an intact quantity phrase; 刚好 scopes over the predicate and belongs before 带.
他刚好回来了。
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.
我要出门时，他刚好回来了。
Just as I was leaving, he happened to return.
我要
Subject
This part occupies the Subject position in the model pattern.
出门时
刚好/恰好
This part occupies the 刚好/恰好 position in the model pattern.
，
Predicate
This part occupies the Predicate position in the model pattern.
他
Subject
This part occupies the Subject position in the model pattern.
刚好
刚好/恰好
This part occupies the 刚好/恰好 position in the model pattern.
回来
Predicate
This part occupies the Predicate position in the model pattern.
了
Subject
This part occupies the Subject 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.
我要出门时，他刚好回来了。
Just as I was leaving, he happened to return.
这双鞋的大小恰好合适。
These shoes happen to be exactly the right size.
我带的钱刚好够买票。
The money I brought is exactly enough for the ticket.
04 / LIMITS
When to Use It — and When Not To
Use it when
- Use 刚好 for a timely coincidence or exact fit.
- Use 恰好 for a matching circumstance in more formal wording.
- Place either adverb before the predicate in its scope.
Do not use it when
- Do not attach perfective 了 to either adverb.
- Do not insert either adverb between a numeral and classifier.
- Do not place the adverb between a verb and its object.
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.
他刚了好回来。
他刚好回来了。
Aspect marker splits the coincidence adverb
刚好 is an indivisible adverb; perfective 了 cannot occur between its two syllables.
我带了三刚好百元。
我刚好带了三百元。
Adverb splits numeral and classifier
三百元 is an intact quantity phrase; 刚好 scopes over the predicate and belongs before 带.
他刚了好回来。
刚好 is an indivisible adverb; perfective 了 cannot occur between its two syllables.
我带了三刚好百元。
三百元 is an intact quantity phrase; 刚好 scopes over the predicate and belongs before 带.
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 刚好/恰好.
07 / APPLY
Apply It in Your Sentence
Write one original sentence with 刚好/恰好. 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
Exact Coincidence with 刚好 and 恰好 Questions
Are 刚好 and 恰好 interchangeable?
Often yes, though 恰好 tends to sound more formal and 刚好 is common in conversation.
How is 刚好 different from 刚才?
刚好 marks exact coincidence or fit; 刚才 locates an event in the recent past.
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, Level 6 item 【六12】 (PDF pp. 234-235)
Provides official Level 6 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 15, Adverbs
Supports stance and time adverbs before the predicate; GF item 【六12】 supplies the coincidence meanings of 刚好 and 恰好.
Official source10 / CONTINUE
Continue with a Connected Rule
Compare
依旧/仍旧Continuity with 依旧 and 仍旧
Distinguish between 刚好恰好 indicating that the condition time point matches exactly and 依旧仍旧 indicating that the status has not changed. Note that the time relationship is different.
Easy to confuse
即Formal Immediate Sequence with 即
Compare the coincidental match of 刚好恰好 to the immediate or equivalent match of 即. The former does not necessarily mean that it occurs immediately.
Continue learning
马上/先/有时/正在Basic Time and Progress Adverbs
Compare 刚好恰好 with 马上先有时正在 and continue to identify the frequency and progression relationship after the time point matches 先.
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Continue learning
Compare 刚好恰好 with 马上先有时正在 and continue to identify the frequency and progression relationship after the time point matches 先.