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问题: 谁是句中的逻辑主语(不懂的人请不要发表意见)

有三个问题:There being nowhere to hide, the thief was caught by the students.
①该句的逻辑主语是什么?
②这是一个独立主格结构吗?为什么?
③There being nowhere to hide在句中做什么成分?

解答:

首先纠正一个错误."逻辑主语"是针对非谓语动词说的,就是说非谓语动词动作的发出者才叫做逻辑主语,以区别于句子主语。
这句话的主语是the thief.
There being nowhere to hide 是There be的非谓语形式,是独立主个格结构,在句中作原因状语。
再如:There being no time left, we have to hurry.(相当于Because there is no time left,……)
又如: There having been no warter for two days, the travelers were all thirsty.(相当于Because there had been no warter for two days,……)