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标题: [求助]GWD1-32 [打印本页]
作者: maimai2009 时间: 2008-12-15 04:55
标题: [求助]GWD1-32
In the correct answer D, why use "should have to" instead of using " have to"?
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
1. have to know a great deal more than now about the social and economic
2. have to know a great deal more than they do now about the social and economical
3. would have to know a great deal more than they do now about the social and economical
4. would have to know a great deal more than they do now about the social and economic
5. would have to know a great deal more than now about the social and economical
作者: rachelchen52 时间: 2008-12-15 05:06
"To develop more accurate..."这里暗示应该是虚拟吧~所以 would have to
作者: maimai2009 时间: 2008-12-15 08:37
以下是引用rachelchen52在2008-12-15 5:06:00的发言:"To develop more accurate..."这里暗示应该是虚拟吧~所以 would have to
To develop是目的状语吧,怎么暗示虚拟呢?哪里有这个说法的?
谢谢了
作者: rfanrfan 时间: 2008-12-15 12:35
have to know a great deal:不得不知道很多(表示已经知道了)
would have to know a great deal:不得不去知道很多(表示还不知道)
作者: maimai2009 时间: 2008-12-15 13:41
谢谢两位,但我还是觉得好像没解释到位...
作者: free1234 时间: 2010-6-24 11:23
为什么不选economic?economical不是经济、合算的意思吗
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