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以后 vs 的时候 (after vs when)
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When or after?
- You tell a friend about last night: you were cooking when he called, and you called back after dinner.
- you你to make a telephone call打电话(modifier / structural particle)的time时候I我at / in在to prepare a meal做饭，吃完饭after以后I我to给you你variant of 回回(completed / change)了a call电话。 — "When you called, I was cooking; after dinner I called you back."
(modifier / structural particle)的time时候 = at the same time
- A (modifier / structural particle)的time时候，B = when A (is happening), B: the two overlap.
- I我arrive到(modifier / structural particle)的time时候，he他was正在eating吃饭 — "When I arrived, he was eating."
I我arrive到when的时候，he他was正在eating吃饭。
During the meal: “Don't look at your phone while eating.” 吃饭____别看手机。
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Overlapping time takes 的时候.
我到的时候，他正在吃饭 means he was eating when I arrived.
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True. …的时候 marks time that overlaps with the main event: when I arrived, he was in the middle of eating. 以后 would mean he ate after I arrived.
after以后 = after, one then the other
- A after以后，B = after A has finished, B: the second follows the first.
- class ends下课after以后，we我们go去play ball打球 — "After class, we'll go and play ball."
class ends下课after以后，we我们go去play ball打球。
Build: “After class, we'll go and play ball.”
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A 以后，B.
Overlap or sequence?
- If B happens during A, use (modifier / structural particle)的time时候; if B happens after A ends, use after以后.
- eating吃饭(modifier / structural particle)的time时候don't be fooled by the fact…别看cell phone手机 (during the meal) is different from eating吃饭after以后don't别right away马上to go to bed睡觉 (after the meal).
“After eating, don't go to bed straight away.” Which fits? 吃饭____别马上睡觉。
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After the meal has finished = 以后.
With completed verbs
- Verb + (completed / change)了 + after以后 stresses completion: you你arrive到(completed / change)了after以后to给I我to make a telephone call打电话.
- For one finished event followed by another, after以后 is the safe choice: I我做完作业after以后go去to go to bed睡觉.
you你arrive到了after以后to给me我make打a call电话。
Recap
- (modifier / structural particle)的time时候 = when (overlapping time); after以后 = after (one event follows another).
- Ask: does B happen during A or after it?
Read the full reference: HSK 4 grammar — Comparing similar time words.
You tell a friend about last night: you were cooking when he called, and you called back after dinner. Close the examples. Say a Mandarin response, then write it in Chinese. Explain briefly in English what the lesson’s pattern adds. Compare with the model, then change one detail and try again.
This is supported productive practice. Compare meaning and structure; your answer need not copy the model. A partner or teacher must hear the spoken response to comment on pronunciation.