题目内容
9.No one can walk the wire in the air without a bit of fear unless ______ very young.( )A. | having trained | B. | trained | C. | to be trained | D. | being trained |
分析 没有人能在丝毫不恐惧的情况下在空中走钢丝,除非很小的时候接受过训练.
解答 答案:B
动词train与其逻辑主语构成被动关系;用于连词unless之后,在句中作条件状语,因此此处在功能上相当于由unless 引导的条件状语从句:unless he is trained very young.这里省略了"主语+be"部分;故选B
点评 做本题时,应掌握过去分词作条件状语时的用法:在功能上相当于if,once或unless等引导的条件状语从句,在该结构中,可以省略位于连词与过去分词之间的主语和系动词be.
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