这是补充性状语吗

Certain features of these engravings lead to the conclusion that they are of great age—geological changes had clearly happened after the designs had been made and local Aboriginal informants, when first questioned about them, seemed to know nothing of their origins.

这句话中—geological changes had clearly happened after the designs had been made是什么语法成分？是补充性状语吗？

是修饰they are of great age的吗？

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分类：难句分析

最佳答案 2023-05-14 12:12

破折号提示后面的句子是对前面句子的补充、解释。剑桥语法把这种分句称为补充语。

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曹荣禄 -

擅长：动词用法,句法问题 | 采纳率 82% | 回答于 2023-05-14 11:10

这是补充性状语吗

最佳答案 2023-05-14 12:12

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