It is unclear to which other species it is closely related.
直接的特殊疑问句,可以把介词放在特殊疑问词之前。例如:
1. Which other species is it closely related to?
2. To which other species is it closely related?
它与其他哪些物种有密切关系?
把上面两句变成名词性从句:
1. I don't know which other species it is closely related to.
2. I don't know to which other species it is closely related.
网友的句子, to which other species it is closely related 是主语从句,it 是形式主语。
我再举几个介词提到特殊疑问词之前的例子:
To what degree are you interested in botany?
你对植物学的兴趣达到什么程度?
For what do we live? 我们活着是为了什么?
For whom, for what, was that bird singing?
鸟儿啊,你这样唱,是为了谁人, 是为了什么?
来自英汉文学
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