求教~~~关于as的用法 OG12 SC 30

毛毛地鼠

30. 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

我的问题是针对D选项的。请问D选项中仅从语法角度来说是正确的吗？

32.Galileo was convinced that natural phenomena, as manifestation of laws of physics, would appear the same to someone on the deck of a ship moving...

OG32题的题干中，也有as的出现，请问这里的as的用法是什么？OG30题D选项中的as可以看作与这里的as是同种用法吗？

潇湘妃子zwhj

把这个帖子顶上去求更多更丰富更详细的解答，

(1) as的用法？在这里到底是做介词还是连词，这两种情况到底区不区分逗号？
(2) OG解释里的protection is awkward in reference to items到底指的是什么？当然加了a是一个问题，但如果排除这个问题，到底是什么原因使得protection不能指代items呢，item是protection，这样的说法也没错吧。而且OG用的词很有意思，reference to。

lei825

就接着说D选项吧，AS我觉得语法上如上所说，做介词时，不做插入语时，前不用逗号
另外说protection 这个问题，
1,a protection与items(复)就不搭
2,protection没有protect直接，即 V>N

无敌可爱多

我觉得这两题的as没有用错，都是介词作为的意思，D选项不对是因为items是具体名词，不能as protection,就是具体不能等于抽象

-- by 会员 小熊诺拉 (2011/6/30 10:07:03)

用as应该可以，as不是linking verb.

这个错误在于a protection的冠词a上面。

小熊诺拉

我觉得这两题的as没有用错，都是介词作为的意思，D选项不对是因为items是具体名词，不能as protection,就是具体不能等于抽象

无敌可爱多

即便是从语法上将也有错误。as所引导的介词短语在牛津高阶上有

used to describe sb/sth appearing to be sb/sth else: They were all dressed as clowns. ◆ The bomb was disguised as a package.
used to describe the fact that sb/sth has a particular job or function: She works as a courier. ◆ Treat me as a friend. ◆ I respect him as a doctor. ◆ You can use that glass as a vase. ◆ The news came as a shock. ◆ She had been there often as a child (= when she was a child).

这两种用法。

但是，这里protection也好，method也好，前面都乍眼的出现了一个冠词a。试问items是复数，如何as a xxxx呢？


此外，GMAT通常会认为出现以上两种用法，或连词，或linking verb的时候，把item看做是protection是一种superficial的parallel.

而GMAT的考点是语法，意思，简洁。在语法都正确的情况下，优先考虑逻辑含义和简洁的选项。

综上所述，即便是排除法，也会把as....引导的几个选项排除无余。

晶晶明明

D选项。。The prepositional phrase as a protection of warriors is awkward and imprecise; using the noun form protection creates wordiness and is awkward in reference to items. 我又看了遍OG的解释，我觉得如果有语法上的问题OG应该会说出来的吧，但是只是说awkward and imprecise..我看了下原题觉得如果as做介词的话后面加的部分过于冗长....再加上又有protection的问题。。。

-- by 会员 若雪 (2011/5/24 11:08:35)

awkward in reference to items。
我觉得重点在这里，

若雪

D选项。。The prepositional phrase as a protection of warriors is awkward and imprecise; using the noun form protection creates wordiness and is awkward in reference to items. 我又看了遍OG的解释，我觉得如果有语法上的问题OG应该会说出来的吧，但是只是说awkward and imprecise..我看了下原题觉得如果as做介词的话后面加的部分过于冗长....再加上又有protection的问题。。。

毛毛地鼠

http://forum.chasedream.com/GMAT_SC/thread-51315-1-1.html

你看这个。。32题解释为作为。。是插入语。。

-- by 会员 若雪 (2011/5/24 10:33:56)

没错，32这里的as短语是做插入语修饰前面的natural phenomena= =我只是不明白32题目中D选项的AS用法有什么问题。。。

so我查了下longman
longman对于as作prep.有4种用法，其中第二种比较类似于30题中D选项的用法：

2
used to say what job, duty, use, or appearance someone or something has: As a parent, I feel that more should be done to protect our children.
A flat stone was used as a table.
Dad dressed up as Santa Claus.
这样看起来30的D选项as的用法确实不标准。。。

若雪

http://forum.chasedream.com/GMAT_SC/thread-51315-1-1.html

你看这个。。32题解释为作为。。是插入语。。