问问呢问 （GWD1-Q32）

aphrodite1990

GWD1-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.  D
A.    have to know a great deal   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 e
D中 为什么是 than they do now 呢 不是应该是than they would now 吗多谢啦

aphrodite1990

upupup

aphrodite1990

帮帮我看看吧~~同志们啊

aphrodite1990

upupupupupuuppup

aphrodite1990

nn们啊 快快出现啊~

aeoluseros

do指代的是know。
其次would have to或者have to其实是一体的，整体可以看作一个auxilary.
在这个题目里面，不推荐用would have to和have to的区别来判题，因为区别太小。

aphrodite1990

(

do指代的是know。
其次would have to或者have to其实是一体的，整体可以看作一个auxilary.
在这个题目里面，不推荐用would have to和have to的区别来判题，因为区别太小。

-- by 会员 aeoluseros (2010/11/29 8:36:15)

我还是有点不太懂诶55555
可是我看到白勇书上面写的是
比较从句动词短语使用助动词（have，has，had，will）或情态动词(Can could may should)+v   的形式时 比较从句省略v保留助动词或情态动词啊  那这里的would不是要保留吗？

stellina

(

do指代的是know。
其次would have to或者have to其实是一体的，整体可以看作一个auxilary.
在这个题目里面，不推荐用would have to和have to的区别来判题，因为区别太小。

-- by 会员 aeoluseros (2010/11/29 8:36:15)

我还是有点不太懂诶55555
可是我看到白勇书上面写的是
比较从句动词短语使用助动词（have，has，had，will）或情态动词(Can could may should)+v   的形式时 比较从句省略v保留助动词或情态动词啊  那这里的would不是要保留吗？

-- by 会员 aphrodite1990 (2010/12/1 1:15:38)

我理解的是，这里有个小虚拟，would have to是他们还没有做的但是应该做的（实际没做），they do now是他们现在做的（实际做了）。。所以这里不要加would。。


关键从语义上来理解啦。。白勇的讲解只是最基本的，已经不太适合现在GMAT语法出题趋势了。。

aphrodite1990

这样说 不用看白勇哦。。~~

tuscan

would have to,虚拟语气