展开是曲词发展的重要手法之一(在民间音乐中称为展衍),即从已陈述过的主题曲调或已发展的其他曲调中抽出有特性片段加以发展,使素材的“种子”作用得以充分发挥。展开的手法有以下几种类型: (1)模进——即将动机或曲调的某一部份(乐节、乐句)照原形在不同的音级、不同的高度上出现,形成这一素材的“变位”,这种手法也可看作是重复手法运 Unfolding is one of the most important ways in the development of the lyrics (called Zhan Yan in folk music), that is, extracting the feature fragments from the theme tunes or other tunes already developed to make the “seed” effect of the material To give full play. There are the following types of unfolding practices: (1) mode-forthcoming Motivation or a part of the tunes (festivals, phrases) according to the original shape at different sound levels, different levels appear to form this material “Displacement”, this approach can also be seen as a repetitive hand