“比喻”是声乐教学中常用的教学手法，恰当的运用比喻，能使学生产生丰富的联想，从而帮助学生解决声乐学习中的一些难题。声乐教学的第一步就是训练“打开口腔”。一般人在张大嘴打开口腔时下巴容易用力，而在声乐教学中的打开口腔练习，下巴是要求放松的。那么，怎样才能做 “Metaphor” is a commonly used teaching method in vocal music teaching. Proper use of metaphor can enable students to generate rich associations and help students to solve some difficult problems in vocal music learning. The first step in vocal teaching is to train “to open the mouth.” Most people open their mouths in the open jaw easily force, and open oral practice in vocal teaching, chin is required to relax. So how can we do it?