该……了 for a Due Action in Chinese
该……了
该……了 says that the appropriate or expected time for an action has arrived. 该 comes before the action, while sentence-final 了 presents the due point as newly relevant. The construction may express a reminder, judgment, or self-directed plan; its force depends on relationship and context rather than the form alone.
Published August 15, 2026
Reviewed August 15, 2026
01 / PATTERN
See the Structure
MODEL
（Subject）+ 该 + Verb Phrase + 了
Read the structure
该……了 says that the appropriate or expected time for an action has arrived. 该 comes before the action, while sentence-final 了 presents the due point as newly relevant. The construction may express a reminder, judgment, or self-directed plan; its force depends on relationship and context rather than the form alone. Keep the model （Subject）+ 该 + Verb Phrase + 了 visible while you compare each sentence.
十一点了，该睡觉了。
It is eleven; it is time to sleep.
Choose the right context
State that the expected time for an action has arrived. Give a contextual reminder about a routine or necessary next step. Place 该 before the action and 了 after the complete predicate.
我们该出发了。
It is time for us to leave.
Respect the boundary
Do not put 了 immediately after 该 before the verb. Do not treat every 该 sentence as a command. Do not use the frame merely to predict that an event will happen soon.
十一点了，睡觉该了。
(It is eleven; sleep should now.)
Repair the pattern
该 follows the action: 该 precedes the action whose due time has arrived, and 了 follows the predicate. 了 splits 该 from its verb: In this frame, 该 directly precedes the verb phrase and sentence-final 了 marks the due situation.
十一点了，该睡觉了。
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.
十一点了，该睡觉了。
It is eleven; it is time to sleep.
十一
（Subject）
This part occupies the （Subject） position in the model pattern.
点了
该
This part occupies the 该 position in the model pattern.
，
Verb Phrase
This part occupies the Verb Phrase position in the model pattern.
该
了
This part occupies the 了 position in the model pattern.
睡觉
（Subject）
This part occupies the （Subject） position in the model pattern.
了
该
This part occupies the 该 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.
十一点了，该睡觉了。
It is eleven; it is time to sleep.
我们该出发了。
It is time for us to leave.
你该吃药了。
It is time for you to take your medicine.
04 / LIMITS
When to Use It — and When Not To
Use it when
- State that the expected time for an action has arrived.
- Give a contextual reminder about a routine or necessary next step.
- Place 该 before the action and 了 after the complete predicate.
Do not use it when
- Do not put 了 immediately after 该 before the verb.
- Do not treat every 该 sentence as a command.
- Do not use the frame merely to predict that an event will happen soon.
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.
十一点了，睡觉该了。
十一点了，该睡觉了。
该 follows the action
该 precedes the action whose due time has arrived, and 了 follows the predicate.
我该了复习生词。
我该复习生词了。
了 splits 该 from its verb
In this frame, 该 directly precedes the verb phrase and sentence-final 了 marks the due situation.
十一点了，睡觉该了。
该 precedes the action whose due time has arrived, and 了 follows the predicate.
我该了复习生词。
In this frame, 该 directly precedes the verb phrase and sentence-final 了 marks the due situation.
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 该……了.
07 / APPLY
Apply It in Your Sentence
Write one original sentence with 该……了. 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
该……了 for a Due Action Questions
Is 该……了 always an order?
No. It may be a reminder, judgment, or statement about the speaker's own next action. Context determines its interpersonal force.
How is 该……了 different from 快要……了?
该……了 evaluates an action as due or appropriate. 快要……了 predicts that an event is close to happening.
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 2 item 【二80】, PDF p. 197 (printed p. 191)
Supports placement in HSK 2; it does not independently establish the usage explanation.
Official source第二章：“了”的用法和意义
BINUS University Chinese Studies thesis author · Bina Nusantara University Library · 2009
Locator: Chapter 2, section on 该……了, PDF p. 7
Documents 该 before an action with sentence-final 了 to indicate that the appropriate time has arrived.
Official source10 / CONTINUE
Continue with a Connected Rule
Easy to confuse
该/应该Advice and Obligation with 该 and 应该
Compare general appropriateness with 该……了 saying that the expected time has now arrived.
Continue learning
变化态：句末“了”Sentence-final 了 for a New Situation
Sentence-final 了 presents the due action as a newly relevant current situation.
Compare
必须/一定Necessity with 必须 and Certainty with 一定
Distinguish an action being due from a stronger obligation or high-certainty judgment.
Learn first
时间Time Word Placement
Review time placement before relating an external time cue to the action now due.
RECOMMENDED NEXT
Easy to confuse
Compare general appropriateness with 该……了 saying that the expected time has now arrived.