两个句子,关于不定式和现分,WeareleftwiththeMogaoCave,YumenguanPassandmanywoderfulchinesepoem(todescribe)thehistory.这里的括号里为什么用不定式而不用describing呢?Transportationismuchmoreefficient,(ensurin

Question

两个句子,关于不定式和现分,
We are left with the Mogao Cave,Yumenguan Pass and many woderful chinese poem( to describe )the history.
这里的括号里为什么用不定式而不用describing呢?
Transportation is much more efficient,(ensuring) that your trip runs smoothly.
然后这里为什么不用不定式to ensure呢,混乱了,

Answer 1

1.to describe 做poem的目的状语,用不定式表示,并不是poem主动发出describe的动作,所以不能用describing
2.ensuring that your trip runs smoothly实际上是省略形式,完整的应该是由which引导的一个定语从句which ensures that your trip runs smoothly