问题补充:
The patient was warned oily food after the operation..
A. to eat not
B. eating not
C. not to eat
D. not eating
答案:
A. to eat not
B. eating not
(答案→)C. not to eat
D. not eating
解析:warn sb not to do sth警告某人不要做某事。句意,病人被警告手术后不要吃油腻食品。故选C。注意:非谓语动词的否定,直接在非谓语动词的前面加not.