孩子们正在学习急救知识时，隔壁教室突然停电了。
The children were being taught first aid when the power went out in the next classroom.
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were英 /wɜː/|美 /wər/
being英 /ˈbiːɪŋ/|美 /ˈbiɪŋ/
taught英 /tɔːt/|美 /tɔt/
解释
were being taught 为过去进行时被动语态，由 were + being + 过去分词 taught 构成，表示在过去某一时间点，主语正在被教授急救知识。when 从句中断这个正在进行的被动过程。
The children were being taught first aid when the power went out in the next classroom.
were being taught 为过去进行时被动语态，由 were + being + 过去分词 taught 构成，表示在过去某一时间点，主语正在被教授急救知识。when 从句中断这个正在进行的被动过程。