here were two grey reef sharks, each about one and a half metres long, which suddenly appeared from behind some coral.Р?然后还有两条灰色的珊瑚鲨,每条大约有1.5米长,突然从珊瑚礁后面游了出来。Р(1)独立主格结构each about one and a half metres long在此作状语。独立主格结构的常见形式有:Р?名词/代词+形容词Р?名词/代词+副词Р?名词/代词+名词Р?名词/代词+介词短语Р?名词/代词+分词Р?名词/代词+不定式Р?☞The old man sat in the sofa, his face serious.老人坐在沙发上,面容严肃。Р?☞He came in, a dictionary in his hand.他走了进来,手里拿着一本词典。Р?☞The thief caught, they felt relieved.小偷抓住了,他们感到放心了。Р【跟踪典例】Р?Much time________(spend)sitting at a desk, office workers are generally troubled by health problems.Р【答案】spent Р【解析】句意:上班族们坐在办工桌前太久,一般会受到健康问题的困扰。分析句子结构可知,分词的逻辑主语和后面主句的主语不一致,应用独立主格结构。分词主语和分词动作之间构成逻辑上的动宾关系,且动作已完成,故用过去分词。Р(2)from behind是双重介词。双重介词一般由两个介词搭配而成,其常见的构成方式如下:Р①from+其他介词。Р?☞The moon appeared from behind the clouds.月亮从云后面露了出来。
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