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标题: GWD-17-Q38 [打印本页]
作者: nothingwrong    时间: 2007-4-2 02:29
标题: GWD-17-Q38

（1）     GWD-17-Q38

All Y chromosomes in existence today are descended from a single ancestor’s who is thought to have lived about 140,000 years ago.

 

  1. a single ancestor’s who is thought to have lived
  2. a single ancestor’s who was thought to live
  3. a single ancestor whom it is thought had lived
  4. the Y chromosome of a single ancestor who is thought to have lived
  5. the Y chromosome of a single ancestor whom it was thought had lived

  不明白为什么是d

作者: Zeldaw    时间: 2007-4-3 13:20

A:a single ancestor’s who is thought to have lived
    

who is wrong

B:a single ancestor’s who was thought to live
    

who is wrong ."was" is wrong

C:a single ancestor whom it is thought had lived
    

whom不对

D:the Y chromosome of a single ancestor who is thought to have lived
    

E:the Y chromosome of a single ancestor whom it was thought had lived

whom不对，was不对

作者: bigmachine    时间: 2007-6-28 11:25

有生命的所有格不是应该用 's表示吗？

D E 中 用的是of 结构，这样可以吗？

作者: stevegt    时间: 2007-6-28 12:13
以下是引用bigmachine在2007-6-28 11:25:00的发言：

有生命的所有格不是应该用 's表示吗？

D E 中 用的是of 结构，这样可以吗？

只是说无生命的东西最好用sth. of sth 并没有说有生命的东西不能有of.况且这个地方用了of sth.后 后面的定从刚好可以很好地修饰sth.

作者: excellor    时间: 2009-1-3 03:26

我同意前半段，但是有疑问为何此处要用have lived?

作者: seditionary    时间: 2013-7-12 01:33
同问，为什么ago要用现在完成时
作者: seditionary    时间: 2013-7-12 01:35
好像有点明白了，to have lived就是表过去，就是在be thought to do短语里面表示过去，往前推了一个时态。。。
不知道能不能这样讲。。。。。
作者: 紫竹墨香    时间: 2014-8-7 17:25
seditionary 发表于 2013-7-12 01:35
好像有点明白了，to have lived就是表过去，就是在be thought to do短语里面表示过去，往前推了一个时态。 ...

是这个意思呢



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