一本正经

• 拼音: yī běn zhèng jīng
• 汉字拆解: 一本 (one proper volume) + 正经 (serious/proper) -> completely serious in manner.

含义

一本正经 means looking or speaking very serious, often with comic deadpan effect.

It can be literal seriousness or humorous contrast when someone says something silly with a straight face. In slangy contexts, the contrast often creates the joke.

例句

1. 他一本正经地解释猫为什么上班。
2. 她一本正经开玩笑，大家反应慢半拍。
3. 别把正式道歉说成一本正经搞笑。

用法指南

语境: deadpan humor, speeches, daily reactions

语气: serious-looking, comic, deadpan

正确说法

• 严肃脸讲荒唐话可说一本正经。（It fits deadpan delivery.）
• 正式场合认真发言也可字面使用。（It can be literal too.）

错误说法

• 把真诚严肃一律当玩笑。（Context decides.）

常见错误

• Do not assume 一本正经 is always funny; it can simply mean serious.

起源与历史

A standard idiom for solemn seriousness became a common descriptor for deadpan humor.

文化背景

时代: 2020s

世代: Broad casual speakers

社会背景: Everyday and online contexts

地区说明: Common idiom across Mainland China.