请教大全659题（og 3）

flywood

这道题为什么在第二个并列平行结构中还有一个AND,我觉得有点歧义啊. 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. 中间的两个结构先并列在和前后并列,它们的形式不就不对应了,不是违反平行的最基本要求吗?望NN解答.

我笨，我努力

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

我认为结构是 such as A ,(同位语作为解释), andB

A－defending the entrance and B－scouting outside the cave 都是名词词性，作为duty的例子

同位语－acting as sentinels and to sound a warning at the approach of danger

flywood

可是在OG的解释中我觉得是所他们四个平行啊，而不是同位语的结构，大家觉得呢？

bon

以下是引用我笨，我努力在2004-6-24 22:59:00的发言：

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

我认为结构是 such as A ,(同位语作为解释), andB

A－defending the entrance and B－scouting outside the cave 都是名词词性，作为duty的例子

同位语－acting as sentinels and to sound a warning at the approach of danger

我觉得你说的对

rt316

以下是引用flywood在2004-6-27 10:56:00的发言：

可是在OG的解释中我觉得是所他们四个平行啊，而不是同位语的结构，大家觉得呢？

OG解释的最后一句说得清楚：the parallelism required among and within the three main verb phrases. acting和sounding是一个概念的两个范畴，可以理解为：作为巡逻兵，也就是监听危险的警报。

bon

翻了og

Because the verb phrases used to describe the bats’ duties are governed by the phrase different duties such as, they should each be expressed in the present participial (or “-ing”) form to parallel defending and scouting. ，这么说来acting as sentinels and sounding和这两者还是平行结构，也就是并列的，不是同位语

flywood

有点明白了,其实是三个平行1、defending the entrance   2、acting as sentinels and  sounding a warning at the approach of danger,     3、scouting outside the cave for new food and roosting sites.然后acting as sentinels and  sounding a warning at the approach of danger是一个概念的两个范畴，所有又用了and连接起来,我的理解对吗？先谢谢楼上几位NN了，这么好心，一定心想事成。

bettyamen

good, this is my problem too. Today I think of that for a long time

xiawudong

og在解释的最后一句话说：parallelism required among and within the three main verb phrase.作者认为是三个并列的动词短语。从题目中可以看出：defending the entrance, acting ..and sounding ..at the approach of danger, and scouting outside the cave for ..这系列的动作发生在三个地方或时刻（红色标识部分）。如果这样理解的话，我还能够接受og的说法。

心晴

以下是引用flywood在2004-6-27 22:47:00的发言：

有点明白了,其实是三个平行1、defending the entrance   2、acting as sentinels and  sounding a warning at the approach of danger,     3、scouting outside the cave for new food and roosting sites.然后acting as sentinels and  sounding a warning at the approach of danger是一个概念的两个范畴，所有又用了and连接起来,我的理解对吗？先谢谢楼上几位NN了，这么好心，一定心想事成。

同意这个，是因为第二个是2个动作，所以这两个词的平行，是比3个动作的平行低一个级别的，就是不同级别的平行。