时间状语从句用法

时间：2026-07-14 06:37:14来源：

时间状语从句用于表示主句动作发生的时间。常见的引导词有：when, while, as, before, after, until, since, once等。

引导词	用法说明	例句
when	表示“当……时”，可指具体时间点或时间段	When I arrived, the meeting had started.
while	表示“当……时”，强调两个动作同时发生	While she was cooking, the phone rang.
as	表示“随着……”或“当……时”，常用于持续动作	As the sun set, we went home.
before	表示“在……之前”	He left before I could say goodbye.
after	表示“在……之后”	We started after the rain stopped.
until	表示“直到……”	She waited until he came back.
since	表示“自从……以来”	I have lived here since 2010.
once	表示“一旦……”	Once you try it, you’ll like it.

掌握这些引导词的用法，有助于更准确地表达时间关系。