Four-Character Pattern: 无A无B
无A无B
Use the formal pattern 无A无B to express the complete absence of both A and B
Repeat 无 (without) before two monosyllabic elements to express the complete absence of both. This creates emphatic four-character expressions that are formal, literary, and often idiomatic. Many 无A无B combinations have become fixed phrases (成语-like) with established meanings beyond their literal translations.
无 is the literary equivalent of 没有. Most 无A无B expressions are fixed combinations that should be learned as vocabulary items. Common ones include: 无时无刻 (every moment), 无法无天 (lawless), 无忧无虑 (carefree), 无边无际 (boundless).
Lesson Targets
Podcast
Podcast: Four-Character Pattern: 无A无B (无A无B)
Listen to Jason & Amy explain the 无A无B pattern
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Understanding 无A无B
The 无A无B pattern is one of the most expressive four-character structures in Chinese. By negating two related elements with 无, it creates a vivid image of total absence or, paradoxically, total presence. The most iconic example is 无时无刻 (literally "without time, without moment"), which — counterintuitively — means "at every moment" when used with 不: 无时无刻不在想你 (not a single moment goes by without thinking of you). Other combinations are more straightforward: 无法无天 (without law, without heaven = completely lawless), 无忧无虑 (without worry, without care = carefree), 无边无际 (without edge, without border = boundless). These expressions have deep roots in Chinese literary tradition and many function as quasi-chengyu. They appear in both written and spoken Chinese, adding force and elegance to descriptions. Learning the most common 无A无B phrases will significantly enrich your expressive range.
Key Points
- 无A无B emphasizes the complete absence of both A and B.
- Many combinations are fixed phrases: 无时无刻, 无法无天, 无忧无虑, 无边无际.
- 无时无刻 is always used with 不: 无时无刻不... = "at every moment" (double negative = positive).
- 无法无天 describes someone who is completely lawless or out of control.
- 无 is the literary/formal equivalent of 没有 — this pattern belongs to elevated Chinese.
- A and B are typically monosyllabic and semantically related or near-synonymous.
The 无A无B structure reflects the Chinese literary tradition of emphatic negation. In Buddhist philosophy, 无 (wú) carries profound meaning — emptiness, non-attachment, the absence of self. While everyday 无A无B expressions are not explicitly Buddhist, they carry echoes of this philosophical depth. The pattern 无忧无虑 (carefree), for instance, resonates with the ideal of freedom from worldly attachments.
Key Vocabulary
Example Sentences
妈妈无时无刻不在想念着国外留学的孩子。
The mother thinks about her child studying abroad at every single moment.
Double negative = "at every moment"
这孩子再不管管就无法无天了。
If we don't discipline this child, he will become completely out of control.
小时候无忧无虑的日子真让人怀念。
The carefree days of childhood are truly something to miss.
站在山顶上，眼前是无边无际的草原。
Standing on the mountaintop, before my eyes was a boundless grassland.
他对这件事无怨无悔。
He has no complaints and no regrets about this matter.
这个团队无论遇到什么困难都无畏无惧。
This team is fearless no matter what difficulties they encounter.
Common Mistakes
无时无刻 must be followed by 不 to complete the double-negative construction. Without 不, the sentence would mean the opposite of what is intended.
Not all A/B combinations work with 无A无B. Most are fixed phrases that must be learned. 无大无小 is not a standard combination — use established phrases like 无边无际.
无法无天 is inherently negative — it means "lawless" or "out of control." It should not be used to describe positive behavior.
Practice Exercises
Tips & Tricks
Learn 无A无B expressions as fixed vocabulary items — most are established phrases, not freely productive patterns.
The most important one to remember: 无时无刻 always needs 不 after it. This is a very common exam point and error source.
Group them by sentiment: positive (无忧无虑, 无怨无悔), negative (无法无天), neutral/descriptive (无边无际, 无时无刻不).
Practice by writing descriptions: scenery (无边无际), childhood memories (无忧无虑), dedication (无怨无悔).
Homework
Write five sentences, each using a different 无A无B expression: (1) 无时无刻不 about something you always think about, (2) 无忧无虑 about a happy memory, (3) 无边无际 about a landscape, (4) 无法无天 about unruly behavior, (5) 无怨无悔 about a commitment or sacrifice.