， 介词好像也可以接doing 的吧，比如OG19：48. The golden crab of the Gulf of Mexico has not been fished commercially in great numbers, primarily on account of living at great depths-- 2,500 to 3,000 feet down.
(A) on account of living
(B) on account of their living
(C) because it lives
(D) because of living
(E) being they live
OG explanation: As used in choices A, B, and D, the phrases on account of and because of are unidiomatic;because, which appears in C and E, is preferable here since because can introduce a complete subordinate clause explaining the reson why the golden crab has not been fished extensively.....Choice D, like A, fail to provide a noun or pronoun to perform the action of living, but even with its the phrease would e more awkward and less clear than it lives
问题1：why on account of and because of are unidiomatic
问题2：D和A中，living 的主语不可以直接看作主句主语么？谢谢
on account of 和 because of 都是介词, 介词必须跟名词. D和A中的living是分词, 而不是名词, 所以on account of living或者because of living
是错的.
living这个词单独用不一定就代表名次词性. 比如: Living at the top of the mountain, I enjoy the view very much. 此处Living表达的是一个动作. 如果前面加一个its, its living就变成一个名次性短语. 但即便这样og也解释说不如 because it lives来的好.
on account of its living ...是否可以
尽管，从表达上来看，用because it lives。。。是最清楚的。但，我还是想搞清楚on account of its living。。。是否可行。至少在语法上
on account of 和 because of 都是介词, 介词必须跟名词. D和A中的living是分词, 而不是名词, 所以on account of living或者because of living
是错的.
living这个词单独用不一定就代表名次词性. 比如: Living at the top of the mountain, I enjoy the view very much. 此处Living表达的是一个动作. 如果前面加一个its, its living就变成一个名次性短语. 但即便这样og也解释说不如 because it lives来的好.
对版主的这句话不是很理解， 介词好像也可以接doing 的吧，比如OG19：
19. In addition to having more protein than wheat does, the protein in rice is higher quality than that in wheat, with more of the amino acids essential to the human diet.
(A) the protein in rice is higher quality than that in
(B) rice has protein of higher quality than that in
(C) the protein in rice is higher in quality than it is in
(D) rice protein is higher in quality than it is in（B）
(E) rice has a protein higher in quality than
薰衣紫草的意思是: 加名词结构.
in addition to后面的加的是由having引导的名词结构, 不要割裂开来看.
薰衣紫草的意思是: 加名词结构.
in addition to后面的加的是由having引导的名词结构, 不要割裂开来看.
同意 in addition to(介词) + Ving 和本题动词名词化的情形不同
living ....从意义上讲是一个分词短语,表示因为.再加上一个 because of 纯属wordy.也是原因之一吧.
.....Choice D, like A, fail to provide a noun or pronoun to perform the action of living, but even with its the phrease would e more awkward and less clear than it lives
同问：如果不考虑WORDY因素，because of living 中为什么要加its变成because of its living 才算正确呢？请牛牛解答！感谢！
on account of 和 because of 都是介词, 介词必须跟名词. D和A中的living是分词, 而不是名词,
请问，如何去分一个单词是分词还是名词呢？困惑ing。。。
注意看这道题中，primarily前面有个逗号，说明逗号后面的living应该是个分词，而不是动名词。
注意看这道题中，primarily前面有个逗号，说明逗号后面的living应该是个分词，而不是动名词。
我的理解,A/B/D中的living是动名词.
on account of /because of 都是介词词组,后面只跟简单名词,如果将动词+ing变成动名词跟在后面来表达复杂的事情,在GMAT里就是unidiomatic,不如直接用because原因状语从句表达干脆利索.
OG解释: on account of living/because of living不能表达完整的主谓关系(没有施动者),即使是在living前加上所有格表达施动者,也不如because原因状语从句表达清晰.
ls解释非常清楚，高手，赞！
并且个人觉得副词修饰介词短语的情况比较少见吧，一般修饰句子。
原因和目的状语也很少用逗号隔开的。
living如果单独出现在on account of或者because of 后面既可以理解为动名词也可以理解为动词的ing形式，这样就产生了歧义，所以要加its所有格表示是一个名词结构，但是这样就不如直接用because it lives简洁。
不知道现在because优于because of和on account of这条规则还能不能用
两个原因：
一、GMAT里面on account of和because of后面比较prefer简单的名词而不是动词词之类，OG里有很多例子
二、on account of living和because of living的主语不是很明确，没有because it lives明确。
另外，中间有个逗号，可以起一定的参考作用，如果后面只是一个状语，有点割裂之嫌。
关于because of its living行不行的问题，OG里有个题的解释里明确说了GMAT不喜欢possesive（its，their等等）＋V-ing这种形式。
对于OG中的解释：Choice D, like A, fails to provide a noun or pronoun to perform the action of living, but even with its the phrases would be more awkward and less clear than it lives.
我是这样理解的：
because of living以及on account of linving中的 living被解释成现在分词，表示一种动作而不是动名词，所以需要living这个动作的发出者，也就是句子的主语golden crab.但是由于是分词结构，补出its还是it？从语法结构上，当然是its. 但是its又不能代表golden crab这个物体。所以its也是awkward and less clear...
而选择了because+从句的结构，还有另外一个重要的因素是：primarily前面有一个逗号；如果单纯的讲on account of和because of都不需要用逗号将原因与主句分开。
gmat总该搞这种because of+doing之类的迷惑选项
我觉得就是总体把握一个原则，就是动词是最有效的，有好多题用抽象名词，那些也是不能选的。
说D和A中的是分词，是根据句子意思来判断的吗？因为这是个介词短语的状语从句，而动名词是不能做状语的，所以只能是分词吗？
如果不是做状语从句，如He have give up his job because
of
failing health。这里面的failing应该是动名词吧？
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