- UID
- 560314
- 在线时间
- 小时
- 注册时间
- 2010-8-28
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
731. 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
正确答案是D.
为什么要用would?
从时态上说,现在时也可以表示正打算和将要做的,have to know 有什么问题?正确答案用的是would,如果表将来,为什么不用原型will?
从逻辑上说,would 如果是情态辅助,为了研究出更为精准的数据,肯定是必须要知道比现在更多的知识,这个既然是必须的,为什么还要软绵绵的辅助一下would?
这两天都被would要搞昏了,有没有条理清楚的大神可以指点一下?
|
|