OG-Gusty westerly winds语法点讨论——while

fancymy

Gusty westerly winds will continue to usher in a seasonablx cool air mass into the region, as a
broad area of high pressure will build and bring fair and dry weather for several days.
A. to usher in a seasonably cool air mass into the region, as a broad area of high pressure
will build and
B. ushering in a seasonably cool air mass into the region and a broad area of high
pressure will build that
C. to usher in a seasonably cool air mass to the region, a broad area of high pressure
building, and
D. ushering a seasonably cool air mass in the region, with a broad area of high pressure
building and
E. to usher a seasonably cool air mass into the region while a broad area of high pressure
builds, which will
答案是E.
BCD的问题较简单先不讨论，E中的which 指代 a broad area of high pressure，fine。但还是想探讨下E为什么是对的？以及一个自己没有想通的点——while。
OG在解释中说，如果A中as是temporal indicator(equivalent to while),a present tense verb would be needed following as or while to show that the second event is concurrent with, or part of, the future situation.所以有答案中的..will continue to usher a seasonably cool air mass into the region while a broad area of high pressure builds... 那么问题来了,while 不是表同时发生吗？前面是will continue 后面是builds，这不算是同时把？？！！
不知道是不是自己钻了牛角尖，还是确实有疏漏的地方，请大家不吝赐教~~~~~~

joe11

有 ,which ... 这个 will 是在后面的这个从句里的，不影响前面主句里的while平行结构（都是一般现在时）。

Melanieeee

这个问题还蛮值得讨论的，我的理解是这里的Gusty westerly winds builds high pressure是指一个公理，所以用现在时，不知道是不是这样

zz冲丫

uu你知道答案了吗？有同样的疑惑