核心问题
The patient was warned ____ oily food after the operation.
A. to eat not B. eating not C. not to eat D. not eating(全国高考,96-18)
我查英汉词典没有查到 warn to do 的用法。
词典解答
英语里确实没有 warn to do 的用法,但是有 warn sb. (not) to do 的用法,上题是这一用法的被动语态:
The doctors warned the patient not to eat oily food after the operation. →The patient was warned not to eat oily food after the operation.
下面是类似的实例：
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I warned you not to buy that old car. (FWF) 我劝过你不要买那辆旧汽车。
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They were warned not to climb the mountain in such bad weather. (ALD) 有人劝诫他们不要在这么坏的天气去登那座山。