不一定

• 拼音: bù yī dìng
• 汉字拆解: 不 (bù) — not; 一 (yī) — one; 定 (dìng) — fixed, certain

含义

Not necessarily; not certain. Used to express that something is possible but not guaranteed.

A common adverb used to soften assertions or challenge assumptions. Often placed before a verb or adjective to express uncertainty or to politely disagree with a statement.

例句

1. 明天不一定下雨，我们可以出去玩。
2. 便宜的东西不一定不好。
3. 他不一定能来，因为他很忙。

用法指南

语境: everyday speech, expressing uncertainty, polite disagreement

语气: tentative

正确说法

• 这个办法不一定有用。(This method might not work.)
• 周末不一定有空。(I'm not necessarily free on the weekend.)

错误说法

• 不一定他不来 — this word order is awkward. Say 他不一定来 (He might not come) with the subject before 不一定.

起源与历史

Compound of 不 (not) and 一定 (certainly, definitely). Literally 'not certainly.'

文化背景

世代: All ages

社会背景: Universal