题目内容
8．He playing the music for the show since last month．（ ）| A． | practices | B． | practiced | C． | has practiced | D． | was practicing |
分析 自从上个月以来他就为表演练习演奏音乐．
解答 答案：C 根据since last month，可知应该用现在完成时态．since last month是现在完成时的标志词．现在完成时态表示过去发生或已经完成的动作对现在造成的影响或结果，或从过去已经开始，持续到现在的动作或状态．现在完成时态的构成：助动词have/has+过去分词，根据主语he，所以应该用has practiced，故选C．
点评 本题主要考查动词时态，做此类题目要注意时间状语、标志词．根据上下文所表达的含义，做出判断．同时更应记清时态的构成形式．就本题而言，主要考查现在完成时态．
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