以下是引用vivian_huang在2007-8-9 23:45:00的发言:
205. The peaks of a mountain range, acting like rocks in a streambed, produce ripples(波纹) in the air flowing over them; the resulting flow pattern, with crests and troughs that remain stationary although the air that forms them is moving rapidly, are known as "standing waves." (A) crests and troughs that remain stationary although the air that forms them is moving rapidly, are (B) crests and troughs that remain stationary although they are formed by rapidly moving air, are (C) crests and troughs that remain stationary although the air that forms them is moving rapidly, is (D) stationary crests and troughs although the air that forms them is moving rapidly, are (E) stationary crests and troughs although they are formed by rapidly moving air, is [although引导的状语从句只能用于引导含动词的结构,如修饰名词性词组,将失去修饰对象]
状语只能修饰动词、形容词,不能修饰名词性词组; D\E都是名词性词组,缺乏C中的remain .... ,因此,此后的although无修饰对象。
看了20分钟,终于明白。。。。
觉得这个说的很好呢,突然茅塞顿开了~~~谢谢~~~ |