题目内容
2.All possible means ,but we can't persuade him to change his mind.( )| A. | has tried | B. | has been tried | C. | have tried | D. | have been tried |
分析 所有的方法都被试过了,但是我们不能说服他改变想法.
解答 答案是D. 考查被动语态,means当名词解释为"方法",单复数同型,这里有all,说明这里的means为复数,means与try之间是被动关系,再根据语境所有的方法都试过了,应该用现在完成时,所以选择A.
点评 被动语态由"助动词be+及物动词的过去分词"构成.被动语态的时态变化只改变be的形式,过去分词部分不变.疑问式和否定式的变化也如此.掌握各种时态的被动语态是解题的关键.
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