2020-09-29 12:49 回答问题

第一个句子是making引导的现在分词短语作后置定语；making与其逻辑主语a boy是主动关系；第二个句子才是定语从句。大多数情况下先行词作定语从句主语时，都可以作这样的简化，例如：The man who was waiting for me has gone.The man waiting for me has gone.但表一次性动作或已经完成的动作时，多数要用定语从句而不用分词短语作后置定语。如：The man who helped me yesterday is my uncle. （一次性）Those who has finished the job may leave now. （已完成）