一下子

• 拼音: yī xià zi
• 汉字拆解: 一 = one; 下 = down/time; 子 = suffix intensifying the sudden nature

含义

All at once; all of a sudden; in one go. Indicates something happening suddenly or instantly.

Emphasizes the rapidity or immediacy of an action or change. Often expresses surprise at how quickly something happened. Can modify both actions (一下子跑了) and changes of state (一下子变了). More emphatic than 一下 alone.

例句

1. 天气一下子变冷了，大家都没准备好。
2. 他一下子吃了五个包子，把我们都吓到了。
3. 房价一下子涨了这么多，年轻人根本买不起。

用法指南

语境: suddenness, surprise, everyday

语气: emphatic

正确说法

• 他一下子就明白了。(He understood all at once.)
• 一下子来了这么多人！(So many people came all of a sudden!)

错误说法

• 我一下子慢慢走 (Contradictory — 一下子 means sudden/fast, can't pair with 慢慢)

起源与历史

Compound of 一 (one), 下 (down, time measure), and 子 (suffix). Emphasizes a single, sudden moment.

文化背景

世代: All ages

社会背景: Universal