How utterly reckless (it is省略)of humanity to have rushed past the Holocene boundary!, ignoring—like a character in a horror movie—all of the obvious warning signs.

人类如此鲁莽地冲过全新世的边界，就像恐怖电影中的一个角色一样，无视所有明显的警告信号。

备注：以上句子感叹句应该使用“感叹号！” 而且，感叹句后面的主谓结构应该使用陈述语序：应该是“it is” 不是“is it”

How utterly reckless (it is省略)of humanityto have rushed past the Holocene boundary,

以上感到句属于“How+形容词+主语+谓语”结构

(1）引导感叹句引导词：how

(2)形容词:how

(3)形式主语:it

(4)系动词:is

(5)真正主语:(of humanity)to have rushed past the HOlocene boundary

(5)表语:How utterly reckless

备注：utterly  为程度副词，作程度状语，修饰作表语形容词reckless，表程度加强。

A:utterly adv.全然；完全地；彻底地

Everything about the country seemed utterly different from what I'd experienced before. 

这个国家的一切似乎与我以前的经历完全不同。

The new laws coming in are utterly ridiculous. 

新颁布的法律荒唐至极。

B:reckless adj.轻率的;不计后果的;鲁莽的;无所顾忌的 

She loved to ride; on horseback, she was reckless and utterly without fear.

她喜欢骑马；在马背上，她纵横驰骋，毫无畏惧。

He is charged with causing death by reckless driving.  

他被控危险驾驶致人死亡。

备注：谓语由“系动词(is)+表语(how utterly reckless)”充当,因为是感叹句，所以把表语提前到句首位置，并放在how后面。

(6)不定式逻辑主语：of humanity 

以下感到句属于“What+a/an+形容词+名词+(主语+谓语)”结构

What a nice girl (she is可省略) !

备注：

(1)how感叹句不能省略后面主语+谓语

(2)what感叹句可以省略后面的主语+谓语

1 刘老师关于本句为感叹句的分析是非常正确的。

2 感叹句通常采用自然语序，但也可以选择性地采用部分倒装语序，虽然倒装语序比较少见。例如：How beautiful (she is) ! How beautiful is she !

3 感叹句的主语为人称代词，谓语为系表结构时，通常省略主语和be. 无论是how还是what引导的感叹句都可以省略，而不是像陈老师说的那样how引导的感叹句不能省略。

4 本句的句型类似于 It is kind of you to help me. 这个句子可以转换为 You are kind to help me. 这个结构中的不定式并不是真正主语，而是表语形容词的方面状语。不能说 Of you to help me is kind.

这个句型用感叹句时，有二种形式：

How kind of you to help me! (it is通常省略）

How kind you are to help me !

5 介词of的作用是引出句子的真正主语。虽然介词的宾语恰好是不定式的逻辑主语，但of you并没有和不定式构成不定式复合结构。陈老师对此的分析是错误。

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 humanity is to have rushed past the Holocene boundary, ignoring—like a character in a horror movie—all of the obvious warning signs.

相应的陈述句为：

It is 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.

= Humanity is utterly reckless to have rushed past the Holocene boundary, ignoring—like a character in a horror movie—all of the obvious warning signs.

ignoring现在分词短语为不定式to have rushed...的结果状语。

不定式短语是表语形容词reckless的方面状语，不是真正主语。