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14.My mother ______ herself busy since she retired from work.(  )
A.keepsB.has keptC.had keptD.would keep

分析 自从妈妈退休以来,她一直忙着.

解答 答案:B 现在完成时基本用法之一:表示过去已经开始,持续到现在,而且还可能继续下去的动作或状态,常与since或for引导的时间状语连用.根据since she retired from work.可知自从妈妈退休以来就一直忙着,并有可能会持续下去,应该用现在完成时态.现在完成时态的构成:助动词have/has+过去分词,根据主语My mother,是第三人单数,所以应该用has,故选:B.

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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