GWD1-32

No.13 GWD1-32:

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 

答案是D，我选A

实在搞不懂为什么要用would have啊！虚拟语气么？完全没必要啊

还有，they do有必要补出来么？

必须是这样，人们将必须了解的更多。

我并不认同

完全从现在就可以开始了，不必要将来时

To graduate, I have to pass all core courses.

用将来时反而奇怪才对

more than 前后是两独立的句子，翻译为不仅仅或不只是，they do 不能省，省了导致比较混乱。虚拟是将来发生，目前还没发生。

所以选D，

demographers have to know a great deal more than now

补助动词是防止主语比较，宾语比较等发生错乱

但这里只有一个主语，并且是自己跟自己比，应该是可以省略

不过这点我不确定

不过would have to我还是不认同

将来时本来就是目前没发生的。不然所有将来时都应该用虚拟语气了。

我仍然不认为To graduate, I have to pass all core courses.这种表达有错

谢谢。这个我以前一点都不知道。我还以为是个错误表达。

那么至少D的语法是没有问题了

不过我还有个疑问，虽然有点咬文嚼字的嫌疑，呵呵

To graduate的确是个不容易确定的动词，是个结果。我的意思是有可能graduate，也有可能不graduate，如果仅凭pass所有科目的话

但develop不一样。虽然know more并不一定导致accurate forecasts，但develop是一定的。

我的意思是，我还不知道是选would have to do还是have to do的逻辑决定因素。