内

• 拼音: nèi
• 汉字拆解: 内 = 冂 (enclosure) + 入 (enter), meaning to be inside an enclosed space

含义

Inside; within. Indicates the interior or inner scope of something.

A formal or written alternative to 里 for expressing 'inside' or 'within'. Often used in compound words: 国内 (domestic), 室内 (indoor), 三天内 (within three days). Also used with time expressions to indicate a deadline or scope. More literary than 里面, which is the everyday spoken form.

例句

1. 请在三天内完成这份报告。
2. 国内旅游的人越来越多了。
3. 室内温度保持在二十五度左右。

用法指南

语境: written language, time expressions, compound words

语气: precise

正确说法

• 一周内必须交论文。(The paper must be submitted within one week.)
• 校内不能骑自行车。(Bicycles are not allowed on campus.)

错误说法

• 我内房间里有一只猫。(Don't use 内 as a standalone preposition before a noun — use 在...里 or 在...内. Say 我房间内有一只猫 or 我房间里有一只猫.)

起源与历史

Originally depicted entering (入) a space enclosed by walls (冂), meaning interior or inside.

文化背景

世代: All ages

社会背景: Universal