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标题: 比较中的省略主谓问题 [打印本页]

作者: kilaspring 时间: 2014-7-1 19:20
标题: 比较中的省略主谓问题

41. To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

(A) have to know a great deal more than now about the social and economic

(B) have to know a great deal more than they do now about the social and economical

(D) would have to know a great deal more than they do now about the social and economic

[url=](E) would have to know a great deal more than now about the social and economic[/url]

为什么E错了，这道题对于时间状语的比较，应该可以省略主谓吧？
比如下面的例子：

I walk as fast now as [I walked] when I was a child.
这里的i walked就可以省略。

作者: lily510 时间: 2014-7-1 21:47

省略是在不引起歧义的情况下做出的。你的例子没有歧义，可是og省略后，很明显引起双方比较不对称的歧义，一方是demographers的knowledge，另一方是时间now。此处想要对比的是demographers know 的 a great deal ，选项D would have to know a great deal more than they do now about the social and economic
中的do 就代指了 know a great deal ，所以不能去掉they do
个人理解。

作者: jhanas 时间: 2014-7-1 22:15
。。。。。。。。。。。

作者: jhanas 时间: 2014-7-1 22:17
我本来以为选B的，一看economical，觉得原来错了。可是这道题目为什么用would have to know.....直接have to know也可以啊。

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