雅思阅读复杂句子分析(8)

　　八.其它特殊句式

　　1. since both rapid and light rail have electric engines， pollution is measured not from the motor exhaust，but from the power plant generating electricity，which is usually located outside the

　　city，where air quality problems are less serious

　　中文译文：因为地铁和轻轨都有电子发动机，所以污染不是从车辆尾气中测量，而是从产生电力的发电厂测量，发电场通常位于城市之外，哪里空气问题不太严重。

　　结构分析：主句中有一个特殊句型：notbut，意思是不是而是， 一般but 后面的内容很重要，是考点。

　　2.it is not uncommon to see several riders clinging to the outside.

　　中文译文：看到几个乘车人挂在外面，并不罕见。

　　结构分析：not uncommon 是双重否定，表示肯定，意思是这种现象很常见。it 是形式主语，to see several riders clinging to the outside 是不定式短语做实际的主语。

　　3.this was because the rta had purchased and removed a number of houses to allow the new corridor to be built，exposing to road traffic noises houses which were once located in a quiet back street

　　中文译文：这是因为rta 已经购买和移走了一些房屋来建造新的连接公路，因此，将原来坐落于一个安静的后街的房屋暴露于公路交通噪音之下。

　　结构分析：exposing 至句尾是现在分词短语做状语，在其中改变了句子的语序，正常的语序是exposing houses which were once located in a quiet back street to road traffic noises,，之所以将houses which were once located in a quiet back street 放在句末，主要是因为它比较长，为了避免句子头重脚轻。