题目内容
5.Bats are surprisingly long lived creatures some ______a life span of around 20years.( )A. | having | B. | had | C. | have | D. | to have |
分析 蝙蝠是一种寿命长得惊人的生物,一些蝙蝠寿命可长达约20年.
解答 答案A.
题干中并没有从属连词或并列连词,设空处应为非谓语动词,故排除B、C两项;D项表示将来的动作.结合语意和句子结构可知此处为独立主格结构,having的逻辑主语是前面的some.,故选A.
点评 本题的考点为独立主格结构,判断依据是逗号前后主语不同,前者是所有蝙蝠,而后者是某些蝙蝠(主语前后不一致又没有用连词引导的从句结构,这是少见的"独立主格"标志).题干主句意为"蝙蝠是一种长寿得令人吃惊的造物",主谓宾成分俱全,可以确定后面的部分为修饰性的"补充说明型"独立主格,相当于一个并列句,通常放在句末,主动关系,形式为:逻辑主语+现在分词=some having.
独立主格结构的概念:
独立主格结构(Absolute Structure)是由名词或代词加上分词等构成的一种独立结构,用于修饰整个句子.独立主格结构中的名词或代词与其后的分词等构成逻辑上的主谓关系.这种结构与主句不发生句法上的联系,它的位置相当灵活,可置于主句前、主句末或主句中,常由逗号将其与主句分开.需特别注意的是,独立主格结构与主句之间不能使用任何连接词.
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