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.
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.
这个having been是什么用法什么时态呢?
做patient的伴随状语从句(也可以放在前面,要考虑逻辑主语问题),记住having been done做后置定语是不行的,但是做状语就不是错的