分类：教育/科学-外语学习-英语考试
问题：英语音标[3:]与[e]发音有什么区别? 
回答：[e][ə][3:]这三个音发音时的舌头部位有点区别:1.[e]前元音中的舌尖音,舌尖抵下齿，舌前部向硬腭抬起成拱形，但不接触硬腭。双唇向两边咧开，口形扁平似微笑；发音时没有摩擦。上、下齿之间的距离约能容纳一根牙签，发音时舌尖部位最高。如:bet set get let debt met pet wet yes yet member yesterday leg egg bed desk pen elephant seven eleven2.[ə]中元音，口形与唇成自然状，肌肉放松，口腔半开，发音时舌头中部最高，短元音。如单词:ago about asleep above again among mother brother doctor teacher never danger sugar order butter picture 3.[3:]平舌音，是由旧国际音标中的[ə:]改过来的,发音规则:口腔在半开状态，唇向两边咧开，舌头平放,长元音。如单词:girl shirt hurt burn bird nurse work worm curse world dirty skirt thirsty worst person curtin serve early