《永乐大典戏文三种》是现存最早的南戏剧本,是考查南曲套式历史形态的重要文献。《张协状元》主要采用孤牌自套,表明早期戏文作家还没有形成组套的自觉意识;本套和复套数量极少,也处于自然形态,但暗合了后世联套的基本要素。《错立身》、《小孙屠》中自套明显减少,本套和复套明显增加,类型更为丰富,说明此时作者的组套意识已显著增强;南曲的组套在自身缓慢发展过程中,由于北套和南北合套的引入,明显提升了组套的水平和层次。北曲最早以套曲形态进入戏文,是经过模仿改造、逐渐“南化”的北套。“戏文三种”的组套形态虽然表现出民间形态的不成熟性,具有区别于北套的特殊性,但已基本具备了后世自套、本套、复套、南北合套四种南套的基本形态。 “Yongle Grand Theatrical Three Ways” is the earliest extant South play script, is an important document to examine the historical form of the Nankai kits. The “Zhang Xie Zhuang Yuan” mainly uses the soliloquy to show that the early writers have not yet formed a conscious group; the number of this set and the number of sets is extremely small, and it is also in its natural form, but it is a coincidence of the basic elements of later generations. The number of self-suits in “wrongly standing body” and “little-grandchildren” obviously decreased, and the number of this set and the number of sets significantly increased. The types were more abundant, indicating that the author’s sense of well-being has been significantly enhanced. During the process, due to the introduction of the North Package and the North-South Package, the level and level of the package have been obviously raised. Bequish the earliest to tales into the play, is through imitation transformation, gradually “Southization ” of the North sets. Although the form of the three kinds of “Theatrical Three” shows the immaturity of the folk form and has the peculiarity of distinguishing it from the north cover, it basically possesses the later self-set, the set, the set, the four sets of the north and south South sets the basic form.