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    精英家教网 > 初中英语 > 题目详情
    18．A middle school student invented a new robot last term．（改为被动语态）
    A new robotwasinventedby a middle school student last term．

    分析 一个中学生上学期发明了一个新的机器人．
    一个新的机器人上学期被一个中学生发明了．

    解答 答案：was invented
    首先注意时态，根据时间状语last term可知为过去的时间，本句是对过去事实的一般描述，需用一般过去时；根据所给的句子，原句为主动语态，要求改为被动语态，被动语态中主语为动作的承受者，本句动作的承受者为a new robot，后加be动词+过去分词，表示"被发明"，考虑时态，此处主语为单数，be动词为was，invent的过去分词为invented，因此为"was invented"．

    点评 考生需先理解句意，再结合句法结构，推测出所要填的词语的正确形态．

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