OG13 SC 42

小布牙

42. To develop more accurate population forecasts, demographers have to know a great dial more than noow about the social and economic determinants of fertility

D. would have to dnow a great deal more than they do now about the social and economic

求指教啊求指教~~~

通过一些排除最后答案选D，但是我没搞懂的是OG的解释写的是：this sentence explains a hypothetical situation and therefore calls for a conditional-or contrary-to-fact-construction
这里有必要用虚拟语气吗？~~~~

lillianess

贴一个关于含蓄条件句的用法说明
含蓄虚拟条件句的七种表现形式

所谓含蓄虚拟条件句即指将条件从句隐藏在上下文一定的短语中的一类条件句，其主要用法及表现形式可归纳如下：
1. 将条件隐含在不定式短语中
I would write to her, but I don’t know her address. 我会给她写信的，就是不知道她的地址。(=If I knew her address, I would write to her. But…)
To have studied harder, you would have passed the examination. 你学习更用功些，你早就考及格了。(=If you had studied harder, you…)
2. 将条件隐含在分词短语中
Born in better times, he would have been a scholar. 如果出生在好时代，他早就成为学者了。(=If he had been born in better times, he would…)
Failing this time, what would you do？ 假若这次失败，那你怎么办？(=If you failed this time, what would…)
Walking alone in the dark, Mary would be terrified. 要一个人单独在黑暗中行走，玛丽会感到十分害怕。(If Mary walked alone in the dark, she…)
3. 将条件隐含在介词短语中
But for your help we couldn’t have succeeded in the experiment. 如果没有你的帮助，我们的实验是不会成功的。(=If it hadn’t been for your help, we…)
In different circumstances, I would have said yes. 在不同的情况下，我就会同意了。(=If circumstances had been different, I would…)
4. 将条件隐含在名词短语中
Any person who had behaved in that way would have been dismissed. 任何人这样做了都会被开除。(=If any person should behave in that way…, he would…)
A few hours earlier, and you would have seen the famous writer. 要是你早来几个小时，你就见到这位著名的作家了。(If you had come a few hours earlier, you…)
5. 将条件隐含在某些连词中
I didn’t know that he was a cheat, or else I wouldn’t have believed him. 我不知道他是个骗子，不然我也不会相信他了。(or else=if I had known he was a cheat))
I’m really very busy, otherwise I would certainly go there with you. 我真的是太忙了，不然我就会同你一道去了。(other wise=if I were not so busy)
6. 将条件隐含在定语从句中
Anyone who had seen that painting might have taken it for a photo. 凡是看过那画的人，都可能把它看成是照片。(=If anyone had seen that painting…)
7. 将条件隐含在一定的上下文中
You might stay here forever. 你可以永远待在这儿。(=If you wanted to, you might…)
Don’t bother to read all these papers. It would take too long. 不要费事看所有这些文件了，那会花太多时间。(=…If you read all these papers, It would take too long

N有许多故事

to do 形式表示一种预期，暗含一种尚未实现的含义。个人理解，仅供参考

小布牙

好的先谢谢了！

waytous

我觉得呢，如果单单拿出来没有would的句子，说有没有错？我觉得没有错。

但是你让我比较有would和没有would两个句子时，有would的更好一些。


GMAT考的不光是correct，更是考effective，大概就是这个意思吧。


抛砖引玉，请大牛猛拍~

DUKB24

我觉得呢，如果单单拿出来没有would的句子，说有没有错？我觉得没有错。

但是你让我比较有would和没有would两个句子时，有would的更好一些。


GMAT考的不光是correct，更是考effective，大概就是这个意思吧。


抛砖引玉，请大牛猛拍~

-- by 会员 waytous (2013/1/9 13:29:02)

国外的ron觉得这题有would没would是没啥差的。。。。我只能这么说。。。

kiwifoodtown

我觉得呢，如果单单拿出来没有would的句子，说有没有错？我觉得没有错。

但是你让我比较有would和没有would两个句子时，有would的更好一些。


GMAT考的不光是correct，更是考effective，大概就是这个意思吧。


抛砖引玉，请大牛猛拍~

-- by 会员 waytous (2013/1/9 13:29:02)

国外的ron觉得这题有would没would是没啥差的。。。。我只能这么说。。。

-- by 会员 DUKB24 (2013/1/9 13:40:43)

我也觉得这题有没有would 都没差。

wqqcs2008

感谢大家对的讨论，还有now那个问题，是不是一般都不存在省略一说？

wqqcs2008

刚刚看另一帖懂了。

kiwifoodtown

wqqcs2008 发表于 2013-3-28 10:41
感谢大家对的讨论，还有now那个问题，是不是一般都不存在省略一说？

NOW表示时间，不能省的吧。

wqqcs2008

kiwifoodtown 发表于 2013-3-28 10:49
NOW表示时间，不能省的吧。

谢谢回答，我问题没有问清楚，我想问的是，now 可不可以理解为 they know now 的省略形式？