A native literacy drama had been created,/its alliance with the public playhouses established,/and at least some of its great traditions had been begun.

　　断句：原则：长度适中

　　方法：寻标志，断长句

　　标点：标点：逗号

　　成分分析：

　　主干：A literacy drama had been created and traditions had been begun

　　修饰：native 定语，修饰名词drama

　　its alliance with the public playhouses established 插入语，修饰前半句

　　at least 状语，修饰and后半句

　　some of its great 定语，修饰名词traditions

　　翻译：

　　本土的文学戏剧被创作出来,它与公众剧院形成联盟，至少在那时,一些好的传统就已经开始了。