HSKReadyGet the appHSK 5 Fixed Phrase: 不X白不X
The fixed phrase 不X白不X expresses that failing to perform an action when a free or convenient opportunity arises would be a waste, roughly translating to 'might as well do X' or 'it would be a waste not to do X'.
今天的点心是免费的，不吃白不吃。
A straightforward example of making use of something free of charge.
Read the full explanation and examples
Core Meaning and Syllabus Scope
In the HSK 5 grammar outline (edition 2025-11, implementation label 2026-07), 不X白不X is classified under fixed phrases (固定格式 - 固定短语). Note that syllabus levels indicate where a pattern appears in the curriculum outline rather than guaranteeing what will appear on a specific test session you book.
The speaker treats not doing X as passing up an available benefit: “we might as well do it.” The opportunity may be free, convenient or already paid for, as in 门票已经买了，不看白不看. This is the speaker’s judgment that using it is worthwhile, not a guarantee of literally zero effort or cost.
今天的点心是免费的，不吃白不吃。
A straightforward example of making use of something free of charge.
Structure and Grammatical Rules
The pattern requires repeating the exact same verb in both slots. In natural speech and writing, the X slot is most commonly filled by a single-syllable action verb that represents taking advantage of something, such as 吃 (to eat), 拿 (to take), 看 (to watch/look), 用 (to use), 问 (to ask), or 去 (to go).
A clear compact sentence normally introduces the object or situation first, then uses the repeated verb: 这张券快过期了，不用白不用. This avoids repeating information the listener already knows. Longer action phrases can occur in conversation, so brevity is a useful model rather than a universal ban on objects.
这张优惠券明天就过期了，不用白不用。
The object (这张优惠券) is introduced as the topic at the start of the sentence.
既然朋友送了两张电影票，不看白不看。
Combines smoothly with 既然 (since/given that) to state the preexisting favorable condition.
Natural Usage, Register, and Limits
This expression belongs primarily to conversational, informal Chinese. Speakers use it to justify taking advantage of an existing condition, persuade a friend not to be overly polite when offered something free, or point out a convenient chance that should not be wasted.
专家正好在现场，有问题不问白不问。
Demonstrates that the pattern also applies to rare opportunities, not only free material items.
- Colloquial register: Avoid using 不X白不X in formal academic essays, official announcements, or solemn occasions.
- Opportunistic undertone: When applied to taking free goods (such as 不拿白不拿 or 不吃白不吃), it can sound slightly opportunistic or thrifty. Among friends it is humorous and candid, but in polite business settings it can sound unrefined.
- Volitional verbs only: The verb must be an action the speaker can consciously choose to perform. Non-volitional verbs or state verbs (such as 姓, 像, or 病) do not fit the logic of seizing an opportunity.
Contrast: 不X白不X vs. 白 + Verb + 了
In these examples, 不看白不看 encourages using a chance, while 白看了 describes viewing that the speaker found pointless. But 白 has several uses, including “free of charge,” so 白 + verb + 了 does not always mean regret.
- 不X白不X presents a reason to act. It can encourage an upcoming action or explain a choice already made: 我当时想：“不去白不去。”于是就跟大家一起去了. The time reference comes from the full context.
- 白 + verb + 了 can mean an action came to nothing, as in 白跑了一趟, or that something was obtained without payment, as in 白吃了一顿饭. Read the surrounding context to identify the intended sense of 白.
那部电影太无聊了，我们白看了。
Contrasts with 不看白不看 by showing past regret (白看了) rather than encouragement to act.
Keep the Wording Compact
The sample sentence with repeated 拿样品 is understandable but wordy. Since the first clause already mentions the samples, 不拿白不拿 gives the same intended suggestion more cleanly. With a one-syllable verb, the core frame has five syllables: 不、拿、白、不、拿.
这家店在发样品，不拿样品白不拿样品。
Repeats the full action phrase 拿样品. It is understandable here, but repeating the samples twice is heavier than the compact alternative below.
这家店在发样品，不拿白不拿。
The first clause supplies the object, so the short repeated verb 拿 expresses the suggestion without extra repetition.
Frequently asked questions
Can X be a two-syllable verb in 不X白不X?
Yes. 不参加白不参加 and 不尝试白不尝试 are possible with suitable opportunities. The familiar single-syllable examples are compact, but their rhythm is not a ban on longer verbs. 不吃白不吃 has five syllables; 不参加白不参加 has seven.
Does 不X白不X sound rude?
It is not inherently rude, and among friends or family it sounds natural and practical. However, if you say 不拿白不拿 or 不吃白不吃 in a formal setting to justify grabbing free items, it can make you sound overly eager for freebies.
How does tone sandhi apply to 不 in this pattern?
Standard tone change rules apply: 不 (bù) is pronounced in the fourth tone before first, second, or third tone verbs (such as 不吃 bù chī), and changes to the second tone (bú) before a fourth tone verb (such as 不用 bú yòng or 不看 bú kàn), even when written in dictionary fourth-tone pinyin.
