prep1-120 为什么要用would??

yinan

up,问nn

d和e中的would问题

ivyfeng

ding!

问： 1 D中的as-clause结构对不对，是不是应该加上as....would do的结构。

     2 E中的as-clause的正确顺序是：As the case with any star of similar mass would be ,
once the Sun exhausts the hydrogen in its core, it will expand into a red giant
and eventually eject。 那个be后面没有同样形式的谓语， as表相似情况的主要原则之一不就是从句谓语和主句谓语形式一致么，还是这又是GMAC的一个”new lesson"

谢谢！

ediewang

以下是引用dirrrk在2008/9/5 9:33:00的发言：

as is the case with...这种用法

怎么理解。。。

old prep解析上面有，

可以搜

michellejoy

"As would be the case" is better than "as is the case" for this sentence because it refers to a hypothetical star of similar mass to the Sun's. If the sentence referred to a specific star to which this happened, then "as was the case" would be appropriate since the construction would refer to an actual event.

in choices C and D, "it" refers to "hydrogen" (the subject of the previous clause). This reference leads to the absurd idea that the _hydrogen_ will expand into a red giant AFTER IT'S ALL GONE. Choice C also exhibits a rather obvious parallelism defect, which also happens to be ungrammatical: "and eventually ejecting" not only fails to be parallel to "will expand," but is also, well, wrong.

Choice B is all kinds of wrong. Since "like any star of similar mass" doesn't have a subject, we need "the Sun" right after the comma (and it isn't there). Like choices C and D, this sentence mistakenly employs "it" to refer to hydrogen. And givemeanid has already pointed out the tense problem.