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标题: 请教一道语法题 [打印本页]

作者: luyinan 时间: 2008-7-7 21:36
标题: 请教一道语法题

Some patients who do not respond to therapies for depression may simply have received
inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be
effective or having been taken off a drug too soon.

划线部分为什么是对的？having been done这个结构能这么用吗？谢谢

作者: laipiyu 时间: 2008-7-8 10:29
能,现在分词分词短语句尾做状语

作者: luyinan 时间: 2008-7-8 13:27

谢谢

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