OG12-41

liz_summer · 发表于 2010-7-25 17:22:41

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
C. would 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
E. would have to know a great deal more than now about the social and economic
答案D
og解析说 conditional verb is needed.
这里是不是一定要用would呢？
我觉得好像也不是那么硬性的错误吧~
谢谢大家帮忙

yueqianchen · 发表于 2010-7-25 17:29:55

同问
还想问，没有宾语为什么还要补出they do

liz_summer · 发表于 2010-7-25 17:35:22

同问
还想问，没有宾语为什么还要补出they do

-- by 会员 yueqianchen (2010/7/25 17:29:55)

两个比较对象平行
they do & know

云南 · 发表于 2010-7-26 12:08:32

我感觉本题中是包含有虚拟的成分，所以用would have to, 应该比现在知道的要多，所以用虚拟。

liz_summer · 发表于 2010-7-26 22:24:13

我感觉本题中是包含有虚拟的成分，所以用would have to, 应该比现在知道的要多，所以用虚拟。

-- by 会员云南 (2010/7/26 12:08:32)

感觉句首有个to 应该表示未来可能发生的事~
是不是有将来的意思~~

云南 · 发表于 2010-7-26 23:11:40

前面的TO表示为了预测的更准确，应该知道的更多，有将来之意

瓜瓜不瓜 · 发表于 2011-5-24 23:51:41

同问啊没什么要虚拟？直接表一般现在时的目的不行么？

ba80418 · 发表于 2011-5-24 23:57:31

我是看两个地方然后排除得D的

1. 一定要用they do来平行前面的know,排除A,E
2.economical是节约的，经济实惠的，而文中应该表达“经济”这个意思，所以用economic,排出B,C

所以就是D了

瓜瓜不瓜 · 发表于 2011-5-25 00:18:34

ls并木有解答我的疑问
用排除法确实能做出来但是还是想知道为嘛要用虚拟
求NN

若雪 · 发表于 2011-5-25 06:35:35

ls并木有解答我的疑问
用排除法确实能做出来但是还是想知道为嘛要用虚拟
求NN

-- by 会员瓜瓜不瓜 (2011/5/25 0:18:34)

我觉得这边用虚拟语气是为了强调这些人必须要懂的比现在多很多才能达到...的目的。未来和现实相反，OG中说“because in order to more accurately predict population, demographers would have to know more than they presently know”

OG12-41

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