题目内容
9.Amy ______ better last night,but she was a little nervous and didn't reach her best standard.( )A. | could perform | B. | must have performed | ||
C. | should perform | D. | could have performed |
分析 艾米本可能表演得更好,但是她有点紧张,没能到达她的最佳水平.
解答 答案是D.本题考查"情态动词+have done"的结构.由句中的last night判断是说明的过去,对过去的或已经发生的事件的说明往往用"情态动词+have done"的结构,由此排除A和C;must have done表示推测,表示"肯定已经…";could have done 在肯定句中表示虚拟"本可能…而实际上没有".根据句意可知,因为紧张艾米没有达到最佳水平,所以她"本可能表演得更好",由此判断答案选择D.
点评 要在正确理解情态动词的基本含义的基础上,整体理解语境中的情感态度,做出合理的判断.
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