新prep1-188

maggie0406

188.
            (26379-!-item-!-188;#058&001961)

 

Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are now drawing solid conclusions about how the human brain grows and how babies acquire language.

A. Neuroscientists, having amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood, are

B. Neuroscientists, having amassed a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are

C. Neuroscientists amassing a wealth of knowledge about the brain and its development from birth to adulthood over the past twenty years, and are

D. Neuroscientists have amassed a wealth of knowledge over the past twenty years about the brain and its development from birth to adulthood,

E. Neuroscientists have amassed, over the past twenty years, a wealth of knowledge about the brain and its development from birth to adulthood,

答案是A，但是不是having done不能这样用吗

为什么D不行呢？

maggie0406

nobody knows?

aha99

同问！having done结构

我认为D的最大错误应该是后半句，drawing...，前面有个now貌似有对比的意思，如果做伴随状语的话是不是前面不应该有now？而且意思不通顺。另一个区别就是与正确选项相比主从句顺序颠倒，不是有种说法说要尽量保持原句主从句结构吗？（有点马后炮的意思）当然我也见过很多原句主从句结构不合理的例子。

主要排除了A，还是having done的问题啊！

[此贴子已经被作者于2009/10/22 13:33:46编辑过]

sunjin1988

我认为D后半句没有谓语吧 OPEN TO DISCUSS

sunjin1988

我认为D后半句没有谓语吧 OPEN TO DISCUSS

ice7heart

having 可以做伴随状语这样用的。prep有很多类似的。D轻易改变了句子的主干结构和原文不对.

having不可以作主语而已但是可以作状语

maggie0406

having 可以做伴随状语这样用的。prep有很多类似的。

不是很明白？

singletonboy

D选项中，now有两种理解

1.now做连词，表示原因，很显然这种情况下后面的句子缺少主语，错

2. now坐时间副词，作状语，修饰drawing,而darwing为伴随状语，修饰主句谓语，这样的话整个分句awkward

至于A选项中，having done做伴随状语修饰主句谓语是可以的，prep中及og中有很多的例句，你可以去查一下

open to discuss

asyz070316

其实 很简单
D选项 就是使原文强调的中心 发生了改变
与原文意思 不相符而已~~   主句变从句  从句变主句

fnm07052

d没有谓语动词be吧，句子结构不完整啊~~~变成了neuroscientists ```now drawing``