过去完成进行时的句子

时间：2026-07-03 08:55:06来源：

过去完成进行时用于描述在过去某一时间之前一直在持续的动作。它由“had been + 现在分词”构成。

总结：

过去完成进行时强调动作的持续性和延续性，常与“when”引导的时间状语从句连用，表示某个动作发生前一直在进行。

结构	例句	含义
had been + V-ing	She had been waiting for an hour when he arrived.	在他到达之前，她已经等了一个小时。
had been + V-ing	They had been studying all day before the exam.	考试前，他们已经学习了一整天。
had been + V-ing	I had been working on the project for two weeks.	我已经在这个项目上工作了两周。

该时态常用于叙述过去的经历或背景，使语言更自然、准确。