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11.Hurry up!The play _______ for half an hour.(  )
A.has been onB.has beganC.has begunD.had begun

分析 快点!演出已经开始半个小时了.

解答 答案:A.
根据for half an hour,可知这里是for引导的一段时间,通常和现在完成时连用,故本句使用用现在完成时态.英语完成时态中瞬间动词不能和表示一段时间的时间状语连用,begin表示瞬间动作,选项BCD都含有begin,排除掉;选项A用be动词的现在完成时形式,可以延续.故选A.

点评 英语完成时态中有瞬间动词与持续性动词之分,瞬间动词只表示瞬间动作,不能和表示一段时间的时间状语连用,反之持续性动词也是一样.再没有时间状语的情况下,就要结合语境具体分析.

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