真题13 1套 32

an0765

Q32:

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

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

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

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

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

would have to know a great deal more than now about the social and economical（(E)

为什么是would have to ?

携隐

这是一个假设的情况，不是真实发生的。是to develop。。。（要想。。。的话），这些人才would have to，不是这些人现在真实状态是have to do sth

buddyk

这个贴将得很详细：

http://forum.chasedream.com/dispbbs.asp?boardid=23&star=1&replyid=635609&id=55880&skin=0&page=1

hedonism555

hehe, 不认为would have to 是虚拟， would 在这不过是一种语气比较委婉的表达方式罢了。 没有上面帖子的NM讲的那么复杂。

would have to 在句中更能表达建议的口吻， 而have to 语气过为肯定， （ 万一这建议并不是唯一的解决办法呢？或还有其他影响因素呢？　）

这题关键在区分economic and economical .

hedonism555

简单的说，　would have to　更严谨。　

hankunlun

考虑的也太细了吧！