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

分析 由于已經(jīng)工作兩天了，史蒂芬設(shè)法按時完成了工作．

解答 答案：D 句子的主語Steve和work之間是主謂關(guān)系，即主動關(guān)系，故用現(xiàn)在分詞作狀語．用having worked表示分詞的動作發(fā)生在主句謂語動詞managed的動作之前．故選D．

點(diǎn)評 考查非謂語動詞作狀語，主要要分清句子的主語和非謂語動詞之間是主動關(guān)系還是被動關(guān)系即可．主動關(guān)系就用現(xiàn)在分詞；被動關(guān)系就用過去分詞．如果分詞的動作很明顯地發(fā)生在主句謂語動詞的動作之前，則用分詞的完成時，即having done．

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