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8.__________ for two days,Steve managed to finish his report on schedule.(  )
A.To workB.WorkedC.To be workingD.Having worked

分析 由于已经工作两天了,史蒂芬设法按时完成了工作.

解答 答案:D 句子的主语Steve和work之间是主谓关系,即主动关系,故用现在分词作状语.用having worked表示分词的动作发生在主句谓语动词managed的动作之前.故选D.

点评 考查非谓语动词作状语,主要要分清句子的主语和非谓语动词之间是主动关系还是被动关系即可.主动关系就用现在分词;被动关系就用过去分词.如果分词的动作很明显地发生在主句谓语动词的动作之前,则用分词的完成时,即having done.

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