Parallel Compound: 一时……一时……
一时……，一时……
Express rapid or unpredictable alternation between two states using 一时……一时……
Use 一时 before two contrasting states to express rapid, unpredictable fluctuation — "one moment A, the next moment B." The tone often implies instability or inconsistency.
一时……一时…… is similar to 时而……时而…… but emphasizes more rapid, unstable alternation. It often carries a slightly negative connotation, suggesting the fluctuation is problematic or undesirable.
Lesson Targets
Podcast
Podcast: Parallel Compound: 一时……一时…… (一时……，一时……)
Listen to Jason & Amy explain the 一时……，一时…… pattern
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Understanding 一时……，一时……
While 时而……时而…… is literary and neutral, 一时……一时…… emphasizes rapid, almost chaotic alternation. When you say 身体一时好一时坏, you are not just noting fluctuation — you are suggesting the changes are quick, unpredictable, and often concerning. This pattern is more colloquial than 时而……时而…… and frequently appears in spoken Chinese when describing unstable situations. It works well for health conditions, emotions, business performance, and anything that swings back and forth in a troubling way. The slightly negative undertone makes it particularly useful for expressing worry or frustration about inconsistency.
Key Points
- 一时 (yīshí) here means "one moment / at one time" — marking rapid alternation.
- More colloquial and emotionally charged than 时而……时而…….
- Often carries a negative or concerned tone — the fluctuation is seen as problematic.
- Best used for things that change rapidly and unpredictably: health, emotions, performance.
- The two states should be opposite or strongly contrasting.
- Can sometimes be written as 一时……，一时又…… with 又 for extra emphasis on the contrast.
In traditional Chinese medicine, the concept of balance (平衡 pínghéng) is central. Describing symptoms as 一时好一时坏 immediately signals to a Chinese doctor that the condition is unstable, which is diagnostically significant. This pattern resonates with the cultural value placed on stability and harmony.
Key Vocabulary
Example Sentences
年纪太大了，身体一时好一时坏。
Getting too old — the body is good one moment and bad the next.
Health fluctuation — concerned tone
这家公司的产量一时上升一时下降。
This company's output rises one moment and falls the next.
他的情绪有波动，一时高兴一时悲伤。
His emotions fluctuate — happy one moment, sad the next.
孩子的成绩一时进步一时退步，让家长很着急。
The child's grades improve one moment and slip the next, making the parents anxious.
病人的体温一时升高一时降低。
The patient's temperature rises one moment and drops the next.
市场行情一时火爆一时冷清。
The market is booming one moment and sluggish the next.
Common Mistakes
In the 一时……一时…… pattern, keep the contrasting elements concise. Use simple antonym pairs (好/坏) rather than modified phrases (很好/很不好).
一时……一时…… implies unstable, problematic fluctuation. Casual alternation between coffee and tea is not negative — use 有时候……有时候…… instead.
Practice Exercises
Tips & Tricks
Remember: 一时……一时 = unstable/problematic fluctuation. 时而……时而 = neutral/literary alternation. 有时候……有时候 = casual variety.
The best word pairs for 一时……一时 are simple antonyms: 好/坏, 高/低, 升/降, 冷/热.
This pattern is especially useful when talking to a doctor: 我的头一时疼一时不疼.
Add context before the pattern to set up the concern: 最近……一时A一时B，让人很担心.
Homework
Write four sentences using 一时……一时…… describing: (1) someone's health, (2) emotional changes, (3) a business or economic situation, and (4) academic performance. Each sentence should convey concern about the instability.