求教OG-SC-30的另一个知识点——不定式的用法

beiminghanxing

For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment， a method to protect warriors against enemy arrows and spears.
(A) a method to protect
(B) as a method protecting
(C) protecting
(D) as a protection of
(E) to protect
很容易就知道答案选C
但是OG关于E的解释说：Although the infi nitive to protect would work if it were not preceded by a comma, it cannot act as a nonrestrictive adjectival phrase modifying items.
这句话的意思是即使把横线前面的逗号去了，to protect也不正确吗？但是我觉得只要把逗号去了to protect读起来完全正确啊？
有谁能给解析下为什么错吗？

beiminghanxing

自己顶下，已经有20个同学看过了怎么没人发表下意见呢？大中小牛们都哪里去了啊？亟待高见啊~

beiminghanxing

呼叫NN！！！

beiminghanxing

用to do的话，表目的，就产生一个逻辑主语的问题

warriors use shields to protect themselves


个人看法，大家讨论

-- by 会员 eshopaholic (2010/10/19 15:08:11)

怎么有人回复也没个通知呢。。。不好意思今天才看到
偶觉得选E的话这句话的结构是应该就是：animal-hide shields... were essential...to protect warriors...
读来完全通顺啊，没看出来有改变句子重心之嫌疑呀。。。
ps：你说的逻辑主语问题偶不太明白，能再具体下不？
谢谢你的回复！！！