向大家请教一道OG,谢谢!

bessette

It is well known in the supermarket industry that how items are placed on shelves and (the frequency of inventory turnovers can be) crucial to profits.

(A)        the frequency of inventory turnovers can be
(B)        the frequency of inventory turnovers is often
(C)        the frequency with which the inventory turns over is often
(D)        how frequently is the inventory turned over are often
(E)        how frequently the inventory turns over can be



答案是E,D为什么不对?
[em13][em13][em13][em13]

zyh79

1.主谓颠倒how+n.+v.，这一点从平行结构也可看出。
2。原有情态动词，语气最好不要变。

Kilroy

D中有两个系动次is, are,而且要与前面的how items are...平行，is 不能倒装

zyh79

are 是的主语是how..and how ，不重复
就算is放后，应该也错， 这里不用被动语态，

bessette

如果D改为:
how frequently the inventory is turned over are often 对不对?

另外,我现在对一个语法点不太清楚:是不是以how,what,where等引导的从句要变为正常语序,即 how + subject + verb

谢谢zyh79, Kilroy!1

zyh79

不对
1。can be 最好不要变为are
2. 存货周转用主动表达挺好啊 被动形式一来没标志词，二来ets不倾向

how,what,where等引导的从句做主语，做宾语，语序为正常语序。

bessette

zyh79:
什么叫标志词?

bessette

thanks!

Kilroy

是我看错了
turns 和前面的are 并列

tongxun

are ：表示事实存在的一种现象，或者 说肯定就是这样的。
can be：是指一种可能性