比较之庖丁解牛续之动词补出原则 - - 以as likely as与more likely than应用为例

rabbit1937

87. (29293-!-item-!-188;#058&003892)
Results of a United States study published in the Annals of Internal Medicine have shown college-educated women and women living in the South and West to be significantly more likely to be using supplemental hormones as women living in the Northeast and Midwest.
(A) college-educated women and women living in the South and West to be significantly more likely to be using supplemental hormones as women living
(B) college-educated women and women living in the South and West as significantly more likely to use supplemental hormones than if they are living
(C) college-educated women and those living in the South and West being significantly more likely to use supplemental hormones than if they lived
(D) that college-educated women and women who live in the South and West are significantly more likely to be using supplemental hormones as were women that lived
(E) that college-educated women and women living in the South and West are significantly more likely to use supplemental hormones than women living

50  Many teenagers undergo stress, but results of a recent study indicate that the patterns of stress that girls experience are more likely to result in depression than are those that boys experience.
(A) are those that boys experience
(B) what boys experience
(C) boys' experience would
(D) boys' stress patterns do
(E) stress patterns of boys
      87题中 第二个women前不需加be动词，women (living in A) are more likely to use
      hormones than women (living in B).  从语法上而言，这个不是肯定要错的吗？为何不用补出are,看了很多人的解释帖子，有的说如果是比use 第二个women前腰加to，但是如果比的是hormone和women，这两个use的对象呢？那不加to在语法上也是没错的啊？感觉这种解释不在点上啊？不知道牛们能否给解释下啊？  
50题中，几乎是一摸一样的结构，这个就果断补出了动词啊。是这两题有区别么？求解释！！

-- by 会员 yangmars (2011/7/14 11:12:28)

87题中， 如果说可能产生歧义的话，那么或许是在likely to use SH than women上面，到底是谁被USE，当然，我想结论是显而易见的——SH，而非women，所以不存在歧义。

然而在50题中，歧义点或产生在result in X than Y 上面，而此题中的Y 如果被导致的话，也貌似能讲通哦。所以为了避免歧义还是要补出的。

总结一下，主系表中主语比较还是要通过含义来判断是不是要补出助动词。这里面表语如果是介词短语的话，往往歧义点就在介宾的身上，要格外注意啦！