老师好，请问下面how...句子成分是什么样？
How utterly reckless of humanity to have rushed past the Holocene boundary, ignoring—like a character in a horror movie—all of the obvious warning signs.
How utterly reckless of humanity to have rushed past the Holocene boundary, ignoring—like a character in a horror movie—all of the obvious warning signs.
【结构剖析】
1. How utterly reckless of humanity to have rushed past the Holocene boundary：感叹句。该句不完整，在形容词reckless 之后省略了 is it，其中it 是形式主语，to have rushed past the Holocene boundary 是真的主语（被外置）
完整的陈述句语序：It is utterly reckless of humanity to have rushed past the Holocene boundary.
完整的感叹句语序：How utterly reckless is it of humanity to have rushed past the Holocene boundary!
我举一个简单的感叹句变化：
陈述句：It is foolish of Tom to have said so. （of 引出foolish 的逻辑主语）
省略的感叹句：How foolish of Tomto have said so!
完整的感叹句：How foolish is it of Tomto have said so!
2. ignoring—like a character in a horror movie—all of the obvious warning signs：目前分词短语，作结果状语。其中，插入的介词短语like a character in a horror movie， 是ignoring 的方法状语。all of the obvious warning signs 是ignoring 的宾语。
