“be doing when...” 结构详解与例句

什么是 “be doing when...”？

“be doing when...” 是英语中一个常见的句型，用于描述 过去某一时刻正在进行的动作被另一个突然发生的动作打断。 其中，“be doing” 通常是 过去进行时（was/were + doing）， 而 “when” 引导的从句通常使用 一般过去时。

基本结构： 主语 + was/were + 动词-ing + when + 主语 + 动词过去式...

经典例句

• I was cooking dinner when the phone rang.
• They were playing soccer when it started to rain.
• She was reading a book when her brother came in.
• We were watching a movie when the power went out.
• He was walking home when he saw an accident.
• The kids were sleeping when the fire alarm went off.
• I was taking a shower when you called me.
• They were discussing the plan when the boss entered the room.

使用小贴士

✅ “be doing” 部分强调动作的 持续性（正在做某事）。

✅ “when” 后面的动作通常是 短暂、突然发生 的事件。

✅ 有时也可以用 “while” 替代，但含义略有不同：“while” 强调两个动作同时持续进行。