El Niño, the periodic abnormal warming of the sea surface off Peru, a phenomenon in which changes in the ocean and atmosphere combine allowing the warm water that has accumulated in the western Pacific to flow back to the east. (A) a phenomenon in which changes in the ocean and atmosphere combine allowing the warm water that has accumulated (B) a phenomenon where changes in the ocean and atmosphere are combining to allow the warm water that is accumulating (C) a phenomenon in which ocean and atmosphere changes combine and which allows the warm water that is accumulated (D) is a phenomenon in which changes in the ocean and atmosphere combine to allow the warm water that has accumulated (E) is a phenomenon where ocean and atmosphere changes are combining and allow the warm water accumulating
本题答案为D.这里有两个问题请教: 1)对于选项E,OG解释中有一条是“Where cannot correctly refer to phenomenon”,where不可以指代phenomenon这没有错,只是where在这里可以与in which替换吗?如果可以那么这里,即使where不可以指代phenomenon,能算是错误吗? 2)本题解释的开场白中:The clause defining phenomenon is clear (in which changes in the ocean and atmosphere combine), but the subsequent phrase, allowing … is not. If the participial phrase were to modify the previous clause, a comma would have to be inserted between combine and allowing. 小弟想问一下,如果使用“allowing”需要加逗号,此时allowing 在句中做什么修饰成分呢?是伴随结果状语吗? 还请NN多提携呀...谢谢!
我和你的办法是一下的,用自己知道的知识点排除一些选项。 答案是选对了,我有个疑问,正确选项D中,“the warm water that has accumulated”,这里为什么要用完成时? 能不能麻烦哪位NN给我解答下。谢谢咯
-- by 会员 小福娃欢欢 (2011/6/16 23:38:39)
D选项是“ is a phenomenon in which changes in the ocean and atmosphere combine to allow the warm water that has accumulated” 在其中,combine用了一般现在时,而accumulate这个动作在combine之前,所以用现在完成时表示动作发生在过去,并且其影响延续到现在。 小弟是这么想的,NN有更好的方法,求拍砖共享~
这句话的主干提取出来应该是: EN,同位语,is a phenomenon (in which changes combine) to allow the warm water (that has accumulated) to flow back to the east. 1、 where or in which。 在GMAT里面 介词+which 优于where。其次,大家别把这个看成一个地方,把厄尔尼诺就看成一个现象,在这个抽象的现象里有啥,where只能只具体地点,这样想就不混了。 2、 to allow 如果allowing这种分词作结果状语的话,要comma与主句隔开,但是的这里的主句是”EN是一个现象”,这个也不能带来warm water to flow back的目的,所以A即使加上is也不对。其实把主干提取出来,将to allow后面理解是changes combine的一个目的会比较好,不定式表目的。 3、 has accumulated。 理解语义之后发现the warm water的accumulate是发生在changes combine这个动作之前的,并且已经完成,所以用现在完成时。