"是……的" Sentences: Emphasizing Details of Past Actions
"是……的"句1
Emphasize the time, place, manner, or agent of a past action using the 是……的 construction
Wrap the emphasized detail (time, place, manner, or agent) between 是 and the verb, with 的 at the end. The action is already known to have happened — 是……的 zooms in on a specific detail about how, when, where, or by whom it happened.
The key concept: the action itself is not news. Everyone knows it happened. The 是……的 structure highlights the specific detail you want to emphasize. 是 can sometimes be omitted in casual speech, but 的 is always present.
Lesson Targets
Podcast
Podcast: "是……的" Sentences: Emphasizing Details of Past Actions ("是……的"句1)
Listen to Jason & Amy explain the "是……的"句1 pattern
New here?
Understanding "是……的"句1
The 是……的 construction is one of the most distinctive structures in Chinese. It is used when the action is already established — everyone knows it happened — and you want to zoom in on a specific detail: when did it happen? where? how? who did it? Think of it like a spotlight on a stage — the action is the whole stage, and 是……的 shines a spotlight on one specific detail. For example, if your friend just arrived in Beijing, the fact that they arrived is already known. But you might ask: 你是什么时候到北京的？(When did you arrive in Beijing?) or 你是怎么来的？(How did you get here?). The 是 marks the beginning of the emphasized information, and 的 closes it. If there is an object, 的 can go before or after it: 他是在网上买的手机 or 他是在网上买手机的. Both are correct, but placing 的 before the object is more common in speech.
Key Points
- Emphasizing time: 我是昨天到北京的 (It was yesterday that I arrived in Beijing).
- Emphasizing place: 他是在网上买的手机 (It was online that he bought the phone).
- Emphasizing manner: 我们是坐飞机来的 (It was by plane that we came).
- Emphasizing agent: 这件事是老师告诉我的 (It was the teacher who told me this).
- The action is already known — 是……的 adds detail, not new events.
- 是 can be omitted in casual speech: 你什么时候来的？ is common.
- 的 position with objects: 的 before object (他是在网上买的手机) or 的 after object (他是在网上买手机的).
- Do not use this structure for actions that have not yet happened — it is strictly for past events.
The 是……的 construction is extremely common in Chinese daily conversation, especially when catching up with friends. "When did you come back?" "How did you get here?" "Who told you?" — these are all natural 是……的 questions that Chinese speakers use constantly.
Key Vocabulary
Example Sentences
我是昨天到北京的。
I arrived in Beijing yesterday. (emphasis: yesterday)
Emphasizing time
他是在网上买的手机。
He bought the phone online. (emphasis: online)
Emphasizing place
我们是坐飞机来的。
We came by plane. (emphasis: by plane)
Emphasizing manner
这件事是老师告诉我的。
It was the teacher who told me this.
Emphasizing agent
你是什么时候来中国的？
When did you come to China?
Question about time
她是在大学学的中文。
She studied Chinese at university. (emphasis: at university)
我是跟朋友一起来的。
I came with a friend. (emphasis: with a friend)
这本书是在哪儿买的？
Where was this book bought?
Question about place
Common Mistakes
是……的 is only for past events. Future actions cannot use this structure.
Do not add 了 inside a 是……的 sentence. The 的 already marks the action as completed. Using both 了 and 的 is redundant.
The emphasized detail must go between 是 and 的, wrapping around the verb. The sentence structure should be: subject + 是 + detail + verb + 的 + object.
Practice Exercises
Tips & Tricks
Think of 是……的 as a spotlight — it does not create new information, it highlights a detail about something everyone already knows happened.
The three most common questions: 是什么时候……的？(when), 是在哪儿……的？(where), 是怎么……的？(how).
Do not add 了 inside 是……的 sentences — the 的 already signals past completion.
Practice by asking friends about their past experiences: 你是什么时候开始学中文的？你是在哪儿上的大学？
Homework
Write ten 是……的 sentences about yourself: three emphasizing time (when you did things), three emphasizing place (where you did things), two emphasizing manner (how you did things), and two emphasizing agent (who did something for you).