<正> 《英语知识》1990年第2期《非限定性动词练习》中The boy regretted<sub>not spendenough time on his study.Ican’t remember<sub>givea chance to try this method.答案分别应为not having spent和having been given.Hecouldn’t bear<sub>fun of like that.(A.making B.tomake C.to be made D.being made)答案为D。笔者认为这几道练习题的答案并不是唯一的,因为: 一、不定式可用完成形式,表示已经发生的动作。例如: