OG 114 vs 184 (关于yet)

114. From the bark of the paper birch tree the Menomini crafted a canoe about twenty feet long and two feet wide, with small ribs and rails of cedar, which could carry four persons or eight hundred pounds of <baggage so light> that a person could easily portage it around impeding rapids.
(E) baggage yet was so light

yet 前没有逗号

184. As measured by the Commerce Department, corporate profits peaked in the fourth quarter of 1988 <and have slipped since then, as many companies have been unable to pass on higher costs.>
(D) but, many companies unable to pass on higher costs, they have slipped since then
(E) yet are slipping since then, because many companies were unable to pass on higher costs

In D, the intrusion of the awkward many... costs causes the antecedent of they to become unclear. Furthermore, a comma should precede the but since it introduces a second independent clause. In E, yet also requires a comma before it, are slipping with since then is illogical, and were unable represents an ungrammatical tense shift.

为什么这里的yet 前要加逗号？

Source: 根据CDer讨论整理出来的我自己的复习笔记，LZ批判着看

    一切为了大平行：大骨架结构的完美对称和意思的完美平行。

    一般来说，yet做连词，前面是要加逗号的，所以OG-183要加。但是在OG-114里面，如果加了逗号，则导致最后这一部分脱离which引导的分句，会引起歧义。Which引导的从句前后被两个逗号隔断，成为不重要的插入成分，最后这个部分反而成了句子主干，变为：The Menomini crafted a canoe, yet was so light that…. 变成了M人的转折，故不正确。

    没有绝对的规则，一切语法点的最高原则是流畅清晰的表意，这个最重要。

    另外可以参考OG-207: In the textbook publishing business, the second quarter is historically weak, because revenues are low and marketing expenses are high as companies prepare for the coming school year.
    And marketing expenses部分前无逗号，避免这部分脱离because的笼罩。

    推论：从句里面不用逗号；主句用，否则构成run-on sentence.

有错大家死命拍砖～