求分析下~这个句子的~句式~成分~结构It's almost impossible not to wonder if maybe,at some point in the distant past,our rocky neighbor once supported life.(来自一篇天文学关于火星的文章)

问题描述:

求分析下~这个句子的~句式~成分~结构
It's almost impossible not to wonder if maybe,at some point in the distant past,our rocky neighbor once supported life.(来自一篇天文学关于火星的文章)

两个逗号之间, at some point in the distant past, 肯定是个插入语,算是状语吧,表时间的,很久以前的某个时候
almost impossible not to wonder 双重否定表肯定,几乎不能不怀疑
if maybe our rocky neighbor once supported life是wonder的宾语从句,怀疑的内容,我们的岩石邻居(火星)曾经也有生命存在。

整体而言的意思就是说:几乎不能不怀疑在很久以前的某个时候我们的岩石邻居(火星)曾经也有生命存在过。

It's almost impossible not to wonder if maybe,at some point in the distant past,our rocky neighbor once supported life.It 形式主语,真正的主语是后面的不定式not to wonder,为平衡句子结构,不至于显得头重脚...