以: Introducing a Formal Purpose in Chinese
……，以……
以 can introduce the intended purpose of a preceding action in concise formal writing, roughly ‘in order to.’ The purpose clause follows the enabling measure, and 以 stands immediately before its purpose predicate. It cannot take aspect, follow the purpose, or introduce a result that has already occurred rather than an intended goal.
Published July 23, 2026
Reviewed July 23, 2026
01 / PATTERN
See the Structure
MODEL
Action or measure，以 + Purpose verb phrase
Read the structure
以 can introduce the intended purpose of a preceding action in concise formal writing, roughly ‘in order to.’ The purpose clause follows the enabling measure, and 以 stands immediately before its purpose predicate. It cannot take aspect, follow the purpose, or introduce a result that has already occurred rather than an intended goal. Keep the model Action or measure，以 + Purpose verb phrase visible while you compare each sentence.
学校调整课程，以满足学生需求。
The school adjusted courses to meet students' needs.
Choose the right context
State the intended purpose of an official measure. Link a method to its goal in formal writing. Use before a purposeful verb such as 促进, 确保, or 纪念.
政府采取措施，以保护生态环境。
The government took measures to protect the environment.
Respect the boundary
Do not put 以 after the purpose predicate. Do not attach 了 to 以. Do not use it for an unintended result.
学校调整课程，满足学生需求以。
(The school adjusted courses, meet student needs in-order-to.)
Repair the pattern
以 follows the purpose predicate: Purpose-introducing 以 must precede the purpose predicate 满足. 了 is attached to the purpose marker: 以 is a purpose marker and cannot take the aspect particle 了.
学校调整课程，以满足学生需求。
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.
学校调整课程，以满足学生需求。
The school adjusted courses to meet students' needs.
学校
Action or measure，以
This part occupies the Action or measure，以 position in the model pattern.
调整
Purpose verb phrase
This part occupies the Purpose verb phrase position in the model pattern.
课程
Action or measure，以
This part occupies the Action or measure，以 position in the model pattern.
，
Purpose verb phrase
This part occupies the Purpose verb phrase position in the model pattern.
以
Action or measure，以
This part occupies the Action or measure，以 position in the model pattern.
满足
Purpose verb phrase
This part occupies the Purpose verb phrase position in the model pattern.
学生
Action or measure，以
This part occupies the Action or measure，以 position in the model pattern.
需求
Purpose verb phrase
This part occupies the Purpose verb phrase 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.
学校调整课程，以满足学生需求。
The school adjusted courses to meet students' needs.
政府采取措施，以保护生态环境。
The government took measures to protect the environment.
道路以英雄的名字命名，以纪念他们。
The road was named after the heroes to commemorate them.
04 / LIMITS
When to Use It — and When Not To
Use it when
- State the intended purpose of an official measure.
- Link a method to its goal in formal writing.
- Use before a purposeful verb such as 促进, 确保, or 纪念.
Do not use it when
- Do not put 以 after the purpose predicate.
- Do not attach 了 to 以.
- Do not use it for an unintended result.
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.
学校调整课程，满足学生需求以。
学校调整课程，以满足学生需求。
以 follows the purpose predicate
Purpose-introducing 以 must precede the purpose predicate 满足.
政府采取措施，以了保护环境。
政府采取措施，以保护环境。
了 is attached to the purpose marker
以 is a purpose marker and cannot take the aspect particle 了.
学校调整课程，满足学生需求以。
Purpose-introducing 以 must precede the purpose predicate 满足.
政府采取措施，以了保护环境。
以 is a purpose marker and cannot take the aspect particle 了.
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 ……，以…….
07 / APPLY
Apply It in Your Sentence
Write one original sentence with ……，以……. 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
以: Introducing a Formal Purpose Questions
How is purpose 以 different from 为了?
Both express purpose, but clause-linking 以 is more concise and formal and follows the enabling action.
Can 以 introduce an accidental result?
No. In this construction it presents an intended goal, not an unintended 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, combined Levels 7–9 item 【七—九123】, 目的复句：……，以…… (printed p. 250)
Supports placement in the official combined Levels 7-9 band; the exact site level remains an internal difficulty label; it does not independently establish the usage explanation.
Official sourceChinese: A Comprehensive Grammar, 2nd ed.
Yip and Rimmington · Routledge · 2016
Locator: Chapter 22, §22.3.9, elucidating purpose ('in order to; so as to'), page 390
Supports a purpose connective before the goal clause; GF supplies 以 as the specific formal linker after the enabling action.
Official source10 / CONTINUE
Continue with a Connected Rule
Compare
因因: Formal Cause
Compare this lesson with formal 因 introducing a cause; both belong to formal cause, purpose, time, and location frames, but they organize a different sentence role or discourse job.
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（因）……，故……因…故…: Formal Cause and Result
Compare this lesson with 因……故…… pairing a formal cause with its result; both belong to formal cause, purpose, time, and location frames, but they organize a different sentence role or discourse job.
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于于: Formal Time and Location
Compare this lesson with 于 introducing formal time, location, range, or comparison; both belong to formal cause, purpose, time, and location frames, but they organize a different sentence role or discourse job.
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以便…以便: So That / In Order To
Continue with the reviewed follow-up lesson to apply this pattern inside a broader, explicitly connected grammar construction.
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