你的问题不是很具体,我也不知道你到底要问什么?举个例子啊,比如说We students
are kept doing homework
all the morning because of the coming exam.这里be done就是单纯的表示被动,-ing则表示一直做某事.望采纳：）
be done doing sth是完成某事之意吗
1个回答
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