请问sad as the scene was是倒桩还是从句？请详细说明一下？

请问sad as the scene was是倒桩还是从句？请详细说明一下？

倒装，as作尽管说，应该倒装，意思是尽管这个场景是悲伤的！

旣是倒装句，又是从句。

sad as the scene was是倒装句。as表示尽管，引导让步状语从句的时候，需要发生部分倒装。如：young as he is, he knows a lot（尽管他年轻，他知道的很多）

As引导让步状语从句,倒装

形容词 + as + 主语 + 动词
Successful as he is，he is not proud. 他虽然成功，但不骄傲。
Improbable as it seems，it’s true. 虽然看起来不太可能，但却是真的。
Stupid as it sounds，I was so in love with her that I believed her. 尽管听起来很愚蠢，我是如此爱她竟然相信了她的话。
Patient as he was，he didn’t like waiting that long. 他虽说有耐心，也不愿等这么长。 Beautiful though the necklace was，we thought it was over-priced. 那条项链虽然很漂亮，我们认为价钱太高。
【说明】其中的动词也通常为连系动词，也就是说位于句首的形容词是其后连系动词的表语。

sad as the scene was
是as引导的让步状语从句。
当as引导让步状语从句时，（也就是as=though) 需要把表语或状语提前到as之前。
名词表语提前时，用零冠词（也就是不用冠词）
有些书把这个也列入倒装。
Fast as he runs, he can't catch up with me.
Child as he is, he knows a lot.