求一道prep语法题

kudoucliff · 发表于 2010-10-14 23:17:41

Practice test 2
75. 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.
B. having, for example, a drug prescription that was ineffective because the dosage was too low or being
C. as, for example, having too low of a dosage of a prescribed drug for it to be effective, or being
D. when they have, for example, been prescribed too low a drug dosage for it to be effective, or were
E. for example, when they have a drug prescription with a dosage too low to be effective, or been

正确答案是A，我有个疑问，having been done不是不能作为状语修饰句子吗？在其它题里用来排除选项的方法在这里又不适用了……

wenchang · 发表于 2010-10-15 12:42:13

这里应该不是修饰句子，这里是举例的内容，实际上是名词形式，一些病人接受了不合适的治疗，比如，处方剂量小以至于无效或过早的被停止用药

这些都是不适合的治疗的内容

chasekai · 发表于 2011-5-17 14:04:45

having been done应该是修饰主语patients的，动名词作用像OG12th第一题一样。
问下楼主，having been done在哪里看到说不能作状语修饰句子的，虽然我也感觉是这样，但是没有evidence...

求一道prep语法题

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