UC知道when___,the washing machines still doesn't work.
来源：百度知道 编辑：UC知道 时间：2024/05/28 20:20:50
A.turn on B.turned off C.turning on D.turned on
d 他的逻辑主语是the washing machines，应该用过去分词表被动。
选D [当被接通电源时，那个洗衣机仍然不能运转。]
<br>本题考查非谓语动词的形式。turn on的逻辑主语是后面的the washing machines ，而洗衣机是被打开的，即它们存在被动关系，所以用动词的过去分词。
<br>若是主动关系，则用现在分词，即动词-ing
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