这个定语应该如何分析 - 柯帕斯英语网

When informed of the Biscari massacre of prisoners, which was by troops under his command, Patton wrote something in his diary.

这个句子改自维基百科，句子中的定语从句“which was by troops under his command”，应该如何分析？ 1、was是系动词，by 介词短语作表语 2、was是助动词，省略了done，by介词短语作状语以上两种看法哪个更合适？谢谢！

我觉得按照系表结构理解更为合理。因为句子要表达的不是被动动作，而是要说明主语所表示的事件的施事者，系词后接介词短语直接说明施事者，无须行为动词。另外，被动语态的句子省略过去分词是没有道理的。下面为COCA类似例句：

And then the second comment was by a gentleman who...

Digital production for this episode was by Alexander McCall, fact-checking by Greta Pittenger.

One of the most damning reports was by former MSNBC host Ronan Farrow, who was...

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曾克辉 1秒前

擅长：英语考试

我觉得第二种理解较为合适，which指代the Biscari massacre of prisoners