请教大全659题（og 3）

fdkbaby

659.    Some bat caves, like honeybee hives, have residents that take on different duties such as defending the entrance, acting as sentinels and to sound a warning at the approach of danger, and scouting outside the cave for new food and roosting sites.
(A) acting as sentinels and to sound
(B) acting as sentinels and sounding
(C) to act as sentinels and sound
(D) to act as sentinels and to sound
(E) to act as a sentinel sounding

参考答案B。

我对这句句子的理解是认为defending the entrance 和 scouting outside并列，是such as 列举的内容。而act...和sound...是类似伴随状语的成分，修饰主语residents在take on the duty of defending the entrance时的状态。

但是不知道是不是我的理解错误，感觉og的解释是defending, acting, sounding和scouting一起并列，都是列举的内容。并且用的是A,B and C, and D的形式。是这样吗？

望各位解惑！

gemj

是A,B and C, and D的形式。
不能理解为“act...和sound...是类似伴随状语的成分，修饰主语residents在take on the duty of defending the entrance时的状态”，因为如果这样修饰的话，acting as sentinels and sounding的位置不能放在这里。

fdkbaby

为什么不能放在这里，是不是因为容易引起混淆，不知道是修饰entrance，还是主语residents？

另外，从句子的意思来看，象哨兵那样，并在敌人临近的时候发出声音，正是defending的内容啊。我怎么感觉这四个并列的内容有些混淆呢！

dreadpower

楼上的MM真够钻研的，汗~~~~

      我的看法是：A，B，and C的结构，你有看过A，（后面跟一个修饰部分），B，（后面再跟一个修饰部分），and C的用法吗？？？

      更何况，按照你的说法，这里的修饰部分acting as sentinels and sounding就算是修饰部分，也对A，B，and C的结构造成了歧义。

fdkbaby

糊涂了。

我的意思是，A，同位成分（解释A），and B。

我觉得原题举了两个不同duty的例子。一个是保卫入口（defending entrance），另一个是到洞外侦察食物和栖息所；一个主内，一个主外。同时而它又解释了保卫入口是怎样的呢？就是象哨兵那样行动和在敌人临近的时候发出声音。

但是如果把这四项并列的话，就是有四种duty，分别是保卫入口、象哨兵那样行动、在敌人临近的时候发出声音和外出侦察食物和栖息所。我感觉这样的四个duty似乎有些overlap。

fdkbaby

大家怎么想啊？

gemj

首先根据OG的解释，ETS的意思确切无疑地是这样的：
{defending the entrance}, {[acting as sentinels] and [sounding a warning at the approach of danger]}, and {scouting outside the cave for new food and roosting sites}

[acting as sentinels] 之所以与[sounding a warning at the approach of danger]}并列再与其他的二个并列，是因为这二者之间有着太强的关系，变成四个成份并列不合适。

如果把这二个并列的成份理解为defending的状语，好象太牵强吧，因为defending本身就是状语，再来个状语来修饰它呀？

如果把它理解为修饰主动词take on the duty of，是不是应该把{[acting as sentinels] and [sounding a warning at the approach of danger]}, 放在句子末尾或放在动词的后面？

[此贴子已经被作者于2003-11-29 23:18:22编辑过]

chiafulee

I'm also confuse about this Q
but I have problems not only second part of this paralleism but also the third part
I have try to dissect the sentence as following:

(1) about the second part of this parallelism

(a)such as defending the entrance

(such as acting as sentinels)
(such as acting as sounding a warning .......)

such as scouting .....

or  

(b)such as defending the entrance

(such as acting as sentinels)
(such as sounding a warning .......)

such as scouting .....
______________________________________________________________________
which one is correct...?????(a) or (b)
But if I could correct the sentence outside the answer choices from Office Guide, I prefer following:
..........such as sentinels that sound a warning............
---->such as sentinels sounding a warning..........

(2) about the third part of this parallelism

two situations
(a) such as scouting outside the cave for new food
     such as scouting outside the cave for roosting sites

(b)such as scouting outside the cave for new food
    such as roosting sites

______________________________________________________________________
which one is correct...?????(a) or (b)


according to the explanation from OG

such as   defending   the entrance(A)
such as   acting    as sentinels(B) and  sounding a warning at the approach of danger(C)
such as   scouting   outside the cave for new food (D)   and   roosting sites(E)

therefore I think the structure for this question is
such as (A), (B) and (C), (D) and (E)
and (B) and (C) must parallel (D) and (E)

so in my opinion if my previous explanation is true, the correct structure might be  (1)(a) and (2)(a)

gemj

我认为(1)(b) and (2)(a)对。
(b)such as defending the entrance

(such as acting as sentinels)
(such as sounding a warning .......)


(a) such as scouting outside the cave for new food
     such as scouting outside the cave for roosting sites

egretxm

我认为gemj 说得没错.

楼主的问题在于: defend the entrance = act as sentinel and sound a warning,  

我的解释--------  保卫出口: 就是在出口保卫.   而哨兵有很多种, 有的在城门口, 有的在城墙上, 还有的在广大的疆土边境上,  不一样的了.

1a+2a的那个,

(a)such as defending the entrance

(such as acting as sentinels)
(such as acting as sounding a warning .......)

such as scouting .....

这要求sentinel 和sounding 并列, 显然不行, 前一个是名词,后一个是强调动作的ing形式.