GWD 15-NO.39

cll0503

GWD 15-NO.39

Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.

• Five hundred million different species of living creatures have appeared on Earth, nearly 99 percent of them vanishing.
              
• Nearly 99 percent of five hundred million different species of living creatures that appeared on Earth have vanished.
              
• Vanished are nearly 99 percent of the five hundred million different species of living creatures that appeared on Earth.
              
• Of five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent of them have vanished.
              
• Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent have vanished.

哪位大侠麻烦解释下B为什么错了，E是答案。

baoguangya

不明白，答案为什么是E呢？原句中用的分明是vanishing，表示正在消失，而E中用的是have vanished，表示已经消失了。这是不是改变句子原意？！

cll0503

原句中的vanishing是状语从句，这句话的时态应该是现在完成时。
            .

ymz

楼主我想应该是时态的问题，B中主句只用了过去时，表达这些生物曾经出现，但是并不说明现在还存在。而E中前后均用了完成时，则表达了从古至今共出现了五亿种生物其中的99%消失了。

B中最大问题是将时间断层了